First 338/375R Range Report!!

[jmad_81]

Well, I couldn't stand it any longer. Its gusting up to 20+ mph here today and I had a few minutes. I robbed the scope off my 338 WM, mounted it to the 338R and headed to the range.

The bottom left group is shots number 4 and 5 down the barrel. I only had two of that load. 81 gr 7828ssc under a 225 SST @ 3.550 lit by a 215M. No chrony data for any of these (wind would have blown it over).

The mid three shots are the same specs, but with 82gr 7828. Shot the bottom one, then the top, then another right next to the first bottom one.

The top four shots are 83 gr 7828. My buddie Andrew, and brother Aaron, both shot two. I'm guessing based on research (another guy on LRH has some results posted with 7828 and a 225 AB), and just kind of throwing a dart, but this load should be around 3050 fps.
View attachment 2013-01-29_14-52-39_957.jpg

Recoil is very managable. I would equate it to a 270 Win. maybe a bit more. I can't wait for a calm day. I have some ladders to shoot with RL-22, H1000, and Magnum. From the looks of things I might want to play around with 7828 a bit more as well. I didn't get any signs of pressure with 7828 yet.

 

[DrMike]

It is incredible when a new rifle surfaces. I fully understand that it is nearly impossible to wait for a calm day to shoot. Good opening set of loads, Jake.

 

[JD338]

Nice job Jake.
I don't think it will take too long for you to find a shooter load.
What about Retumbo?

JD338

 

[jmad_81]

Jim, I might give it a try, but I think it might be a bit on the slow side. We'll see. My cases are pretty dang full with the top end of the ladders that I have loaded. I'll know more as I feel her out. It does appear to want to try to shoot though.

I need to get a good calm day so I can set my chrony up and really learn a thing or two about it. I have a few meetings the rest of the week, but if I can get out of the office I'm sure going to!

Thanks, Mike. I'm just using the 225 SST right now to develop some peramiters for load data. AS soon as I find the top ends, or a powder that seems to shoot better than the others I'll move over and start working up some loads for the 225 AB.

On a side note, the 225 SST, doesn't hold together at all out of this gun into a dirt bank @ 100 yards. Looked like some twisted copper pancakes.

 

[Woodycreek]

Looking good so far with 7828. Think that will be what I try first after talking to you and seeing the first groups.

 

[atmoshpere]

Definitely an awesome round in a sharp looking rig! I'm sure that those of you who shoot large-bore breaked (broke? lol) rifles will know what I mean when I say the recoil, while forceful, is tamed to a not unpleasant shove. I'd say Jake's comparison to a 270 is accurate, thought I would say that a 270's recoil is "sharper" if that makes any sense.

Can't wait to see you thump something with it! (Looks at watch...) Any time now. :lol:

 

[SJB358]

Great shooting Jake! That is a screaming load right there. I said it on the other post, but take a look at RL19. It looks very good and just may give you a touch more case space.

Saying that 7828 looks good, so I'm betting RL22 will be awesome as well. That rifle should be really when you get it tuned up. With the way it's shooting right now, I bet it won't take long!

 

[jmad_81]

Scotty, For this round I'm workling with what I think will be the slower end of powders for it. Next round will be with RL-19, Ramshot Hunter, and I might try to get my hands on some 4831sc.

 

[FOTIS]

Nice. I can not wait for a full report

 

[SJB358]

Scotty, For this round I'm workling with what I think will be the slower end of powders for it. Next round will be with RL-19, Ramshot Hunter, and I might try to get my hands on some 4831sc.

RL17 might be good as well. Supposed to be very good in the 375 Ruger. I imagine you won't have too much trouble getting what you want Jake. It's a great build.

 

[IdahoCTD]

It sounds pretty close to my .338 Baer (slightly lower capacity) so I suspect the best powders will be from R-22 to H-1000. I shoot 83grs of R-22, 84grs of 7828, and 88grs of H-1000 with 250's. All of them are within 50fps of each other and all shoot tiny little groups.

 

[jmad_81]

I shoot RL-17 in my 338 WM with the 225 AB, and have played with it in my 375R with the 270 TSX. It seems to shoot good in both. If I can ever get my hands on some 260 AB seconds, I'll do a bunch more load work with RL-17. But right now Big game is my go to powder for the 260 AB. Gives me MOA groups all day @ 2835 fps.

I'm thinking that case capacity to bullet diamiter wise, it might preform better with some of the medium burners like RL-19, RL-22, H4350, Hunter, and so on. It kind of reminds me of a bigger 30-06. With that said, there isn't a ton of load data available, so I'm going to work it with everything I have.

Scotty, would you run a few QL for me with some of these different powders? 25" barrel. 225 AB @ 3.550"

 

[jmad_81]

It sounds pretty close to my .338 Baer (slightly lower capacity) so I suspect the best powders will be from R-22 to H-1000. I shoot 83grs of R-22, 84grs of 7828, and 88grs of H-1000 with 250's. All of them are within 50fps of each other and all shoot tiny little groups.

Thanks, I'll have to look at my ammo box and see what charges I used on my ladder. I'm thinking that they are right around there, but I'm pushing a 225. So I should be pretty close I think.

 

[SJB358]

Sure will Jake. But I'm away from the computer right now.

 

[Woodycreek]

Got this from last time Scotty ran it at 3.6"

Cartridge : .338-375 Ruger
Bullet : .338, 225, Nosler AccuBond 54357
Useable Case Capaci: 90.081 grain H2O = 5.849 cm³
Cartridge O.A.L. L6: 3.600 inch = 91.44 mm
Barrel Length : 26.0 inch = 660.4 mm

Predicted Data for Indicated Charges of the Following Powders.
Matching Maximum Pressure: 64000 psi, or 441 MPa
or a maximum loading ratio or filling of 110 %
These calculations refer to your specified settings in QuickLOAD 'Cartridge Dimensions' window.
C A U T I O N : any load listed can result in a powder charge that falls below minimum suggested
loads or exceeds maximum suggested loads as presented in current handloading manuals. Understand
that all of the listed powders can be unsuitable for the given combination of cartridge, bullet
and gun. Actual load order can vary, depending upon lot-to-lot powder and component variations.
USE ONLY FOR COMPARISON !

155 loads produced a Loading Ratio below user-defined minimum of 90%. These powders have been skipped.
Powder type Filling/Loading Ratio Charge Charge Vel. Prop.Burnt P max P muzz B_Time
% Grains Gramm fps % psi psi ms
--------------------------------- -----------------------------------------------------------------
Norma MRP 102.4 88.7 5.75 3077 100.0 64000 11329 1.208 ! Near Maximum !
Vihtavuori N560 104.1 88.4 5.73 3075 99.1 64000 11723 1.203 ! Near Maximum !
Ramshot Magnum 106.4 94.6 6.13 3074 99.6 64000 11470 1.195 ! Near Maximum !
PB Clermont PCL 517 106.8 94.7 6.14 3073 99.6 64000 11459 1.195 ! Near Maximum !
SNPE Vectan SP 12 106.7 94.6 6.13 3072 99.6 64000 11437 1.195 ! Near Maximum !
Accurate MAGPRO 104.4 92.1 5.97 3066 98.1 64000 11809 1.210 ! Near Maximum !
Alliant Reloder-25 110.0 90.8 5.89 3063 100.0 62985 10855 1.206 ! Near Maximum !
IMR 7828 108.7 87.7 5.68 3061 99.3 64000 11317 1.194 ! Near Maximum !
IMR 7828 SSC 102.8 87.7 5.68 3061 99.3 64000 11317 1.194 ! Near Maximum !
Alliant Reloder-22 104.4 87.7 5.68 3049 99.8 64000 11225 1.209 ! Near Maximum !
Bofors RP5/NP ~approximation 104.4 87.7 5.68 3049 99.8 64000 11225 1.209 ! Near Maximum !
Raufoss RA15 104.4 87.7 5.68 3049 99.8 64000 11225 1.209 ! Near Maximum !
Winchester WXR 107.2 88.1 5.71 3048 99.8 64000 11244 1.210 ! Near Maximum !
ADI AR 2213 103.8 87.1 5.65 3046 99.2 64000 11236 1.193 ! Near Maximum !
ADI AP 2214 107.6 92.7 6.01 3037 99.4 64000 11046 1.191 ! Near Maximum !
Alliant Reloder 33 110.0 100.4 6.50 3016 95.9 57062 12424 1.259 ! Near Maximum !
Vihtavuori N570 110.0 96.3 6.24 3016 95.0 56192 12554 1.266 ! Near Maximum !
Rottweil R905 105.6 87.0 5.64 3015 99.0 64000 10986 1.210 ! Near Maximum !
Bofors RP5 NT ~approximation 107.4 90.9 5.89 3011 97.8 64000 11131 1.198 ! Near Maximum !
ADI AR 2209 100.7 83.1 5.39 3006 99.7 64000 10652 1.201 ! Near Maximum !
Alliant Reloder-19 101.2 84.0 5.45 3004 99.8 64000 10713 1.208 ! Near Maximum !
Norma MRP 2 110.0 91.3 5.92 2999 99.1 57955 11553 1.262 ! Near Maximum !
Bofors RP14 ~approximation 101.9 84.7 5.49 2997 99.7 64000 10635 1.209 ! Near Maximum !
Ramshot Hunter 96.7 82.9 5.37 2994 100.0 64000 10283 1.215 ! Near Maximum !
Winchester 760 91.4 80.3 5.20 2993 100.0 64000 10334 1.216 ! Near Maximum !
Hodgdon H414 91.4 80.3 5.20 2993 100.0 64000 10334 1.216 ! Near Maximum !
Raufoss RA4 99.2 82.3 5.34 2980 99.7 64000 10445 1.210 ! Near Maximum !
Bofors RP4 ~approximation 99.2 82.3 5.34 2980 99.7 64000 10445 1.210 ! Near Maximum !
Norma 204 96.0 82.3 5.34 2980 99.7 64000 10445 1.210 ! Near Maximum !
Hodgdon H4831 106.5 85.9 5.57 2979 98.7 64000 10610 1.207 ! Near Maximum !
Hodgdon H4831 SC 102.4 85.9 5.57 2979 98.7 64000 10610 1.207 ! Near Maximum !
Vihtavuori N550 93.6 79.4 5.14 2970 100.0 64000 9978 1.226 ! Near Maximum !
Somchem S365 98.3 81.1 5.26 2970 100.0 64000 9536 1.228 ! Near Maximum !
Norma URP 96.3 79.1 5.12 2969 100.0 64000 9843 1.222 ! Near Maximum !
Bofors RP19 ~approximation 96.3 79.1 5.13 2968 100.0 64000 9840 1.223 ! Near Maximum !
Somchem S385 101.4 85.1 5.51 2964 100.0 64000 10184 1.229 ! Near Maximum !
Accurate 4350 99.7 79.2 5.13 2963 100.0 64000 9788 1.240 ! Near Maximum !
Winchester Supreme 780 99.7 87.3 5.66 2954 99.7 64000 10167 1.215 ! Near Maximum !
Bofors RP4 NT ~approximation 96.8 81.6 5.29 2953 100.0 64000 10006 1.222 ! Near Maximum !
Rottweil R904 100.0 81.9 5.31 2951 99.2 64000 10216 1.212 ! Near Maximum !
IMR 4831 101.0 80.3 5.20 2949 100.0 64000 9618 1.232 ! Near Maximum !
Vihtavuori N165 106.7 87.6 5.68 2948 99.9 64000 9949 1.220 ! Near Maximum !
SNPE Vectan SP 11 90.1 77.2 5.00 2944 100.0 64000 9492 1.222 ! Near Maximum !
Hodgdon H1000 110.0 90.4 5.85 2940 98.7 57448 10843 1.250 ! Near Maximum !
Hodgdon H4350 98.8 80.2 5.20 2939 99.9 64000 9841 1.215 ! Near Maximum !
Lovex S070 96.1 78.9 5.11 2938 100.0 64000 9826 1.230 ! Near Maximum !
IMR 4350 96.9 80.1 5.19 2938 100.0 64000 9817 1.215 ! Near Maximum !
Lovex S071 110.0 86.4 5.60 2936 100.0 63076 9818 1.252 ! Near Maximum !
Accurate 3100 110.0 86.4 5.60 2936 100.0 63076 9818 1.252 ! Near Maximum !
Vihtavuori N160 106.7 85.0 5.51 2933 99.1 64000 10021 1.216 ! Near Maximum !
Bofors RP7 NT ~approximation 91.2 76.4 4.95 2929 100.0 64000 9537 1.204 ! Near Maximum !
Hodgdon Hybrid 100V 98.8 79.4 5.14 2920 100.0 64000 9063 1.225 ! Near Maximum !
Rottweil R907 94.0 76.6 4.96 2920 99.9 64000 9719 1.224 ! Near Maximum !
IMR 4007 SSC 91.0 76.7 4.97 2920 99.9 64000 9712 1.224 ! Near Maximum !

 

[SJB358]

I shoot RL-17 in my 338 WM with the 225 AB, and have played with it in my 375R with the 270 TSX. It seems to shoot good in both. If I can ever get my hands on some 260 AB seconds, I'll do a bunch more load work with RL-17. But right now Big game is my go to powder for the 260 AB. Gives me MOA groups all day @ 2835 fps.

I'm thinking that case capacity to bullet diamiter wise, it might preform better with some of the medium burners like RL-19, RL-22, H4350, Hunter, and so on. It kind of reminds me of a bigger 30-06. With that said, there isn't a ton of load data available, so I'm going to work it with everything I have.

Scotty, would you run a few QL for me with some of these different powders? 25" barrel. 225 AB @ 3.550"

RL19

Cartridge : .338-375 Ruger
Bullet : .338, 225, Nosler AccuBond 54357
Useable Case Capaci: 88.955 grain H2O = 5.776 cm³
Cartridge O.A.L. L6: 3.550 inch = 90.17 mm
Barrel Length : 25.0 inch = 635.0 mm
Powder : Alliant Reloder-19

Predicted data by increasing and decreasing the given charge,
incremented in steps of 1.0% of nominal charge.
CAUTION: Figures exceed maximum and minimum recommended loads !

Step Fill. Charge Vel. Energy Pmax Pmuz Prop.Burnt B_Time
% % Grains fps ft.lbs psi psi % ms

-10.0 92 75.29 2697 3633 46780 10280 97.2 1.361
-09.0 93 76.12 2725 3711 48339 10385 97.5 1.341
-08.0 94 76.96 2754 3790 49945 10486 97.9 1.321
-07.0 95 77.79 2783 3870 51597 10584 98.2 1.301
-06.0 96 78.63 2812 3950 53298 10677 98.5 1.282
-05.0 97 79.47 2840 4031 55054 10766 98.7 1.263
-04.0 98 80.30 2869 4112 56868 10850 99.0 1.245 ! Near Maximum !
-03.0 99 81.14 2897 4194 58743 10931 99.2 1.227 ! Near Maximum !
-02.0 100 81.98 2926 4277 60681 11007 99.4 1.209 ! Near Maximum !
-01.0 101 82.81 2954 4360 62685 11078 99.5 1.192 ! Near Maximum !
+00.0 102 83.65 2982 4444 64756 11145 99.7 1.175 !DANGEROUS LOAD-DO NOT USE!
+01.0 103 84.49 3011 4528 66898 11207 99.8 1.158 !DANGEROUS LOAD-DO NOT USE!
+02.0 104 85.32 3039 4613 69114 11264 99.9 1.142 !DANGEROUS LOAD-DO NOT USE!
+03.0 105 86.16 3067 4699 71407 11315 99.9 1.126 !DANGEROUS LOAD-DO NOT USE!
+04.0 106 87.00 3095 4784 73780 11362 100.0 1.110 !DANGEROUS LOAD-DO NOT USE!
+05.0 107 87.83 3122 4871 76236 11404 100.0 1.094 !DANGEROUS LOAD-DO NOT USE!

Results caused by ± 10% powder lot-to-lot burning rate variation using nominal charge
Data for burning rate increased by 10% relative to nominal value:
+Ba 102 83.65 3098 4794 76882 10753 100.0 1.095 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 102 83.65 2817 3965 52877 11073 95.6 1.281


RL22

Cartridge : .338-375 Ruger
Bullet : .338, 225, Nosler AccuBond 54357
Useable Case Capaci: 88.955 grain H2O = 5.776 cm³
Cartridge O.A.L. L6: 3.550 inch = 90.17 mm
Barrel Length : 25.0 inch = 635.0 mm
Powder : Alliant Reloder-22

Predicted data by increasing and decreasing the given charge,
incremented in steps of 1.0% of nominal charge.
CAUTION: Figures exceed maximum and minimum recommended loads !

Step Fill. Charge Vel. Energy Pmax Pmuz Prop.Burnt B_Time
% % Grains fps ft.lbs psi psi % ms

-10.0 94 78.34 2713 3677 45248 10784 97.0 1.382
-09.0 96 79.21 2744 3762 46856 10895 97.4 1.360
-08.0 97 80.08 2775 3847 48526 11002 97.8 1.339
-07.0 98 80.95 2806 3933 50259 11104 98.1 1.318
-06.0 99 81.82 2837 4020 52062 11200 98.4 1.297
-05.0 100 82.69 2867 4108 53926 11292 98.7 1.276
-04.0 101 83.56 2898 4197 55852 11378 99.0 1.256 ! Near Maximum !
-03.0 102 84.43 2929 4286 57843 11459 99.2 1.237 ! Near Maximum !
-02.0 103 85.30 2960 4376 59908 11534 99.4 1.217 ! Near Maximum !
-01.0 104 86.17 2990 4467 62051 11604 99.6 1.198 ! Near Maximum !
+00.0 105 87.04 3020 4558 64275 11667 99.7 1.180 ! Near Maximum !
+01.0 106 87.91 3051 4650 66583 11725 99.8 1.162 !DANGEROUS LOAD-DO NOT USE!
+02.0 107 88.78 3081 4743 68980 11776 99.9 1.144 !DANGEROUS LOAD-DO NOT USE!
+03.0 108 89.65 3111 4836 71469 11821 100.0 1.126 !DANGEROUS LOAD-DO NOT USE!
+04.0 109 90.52 3141 4930 74056 11859 100.0 1.109 !DANGEROUS LOAD-DO NOT USE!
+05.0 110 91.39 3171 5025 76745 11893 100.0 1.092 !DANGEROUS LOAD-DO NOT USE!

Results caused by ± 10% powder lot-to-lot burning rate variation using nominal charge
Data for burning rate increased by 10% relative to nominal value:
+Ba 105 87.04 3149 4955 78056 11205 100.0 1.091 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 105 87.04 2833 4011 51163 11599 95.3 1.298


H4350

Cartridge : .338-375 Ruger
Bullet : .338, 225, Nosler AccuBond 54357
Useable Case Capaci: 88.955 grain H2O = 5.776 cm³
Cartridge O.A.L. L6: 3.550 inch = 90.17 mm
Barrel Length : 25.0 inch = 635.0 mm
Powder : Hodgdon H4350

Predicted data by increasing and decreasing the given charge,
incremented in steps of 1.0% of nominal charge.
CAUTION: Figures exceed maximum and minimum recommended loads !

Step Fill. Charge Vel. Energy Pmax Pmuz Prop.Burnt B_Time
% % Grains fps ft.lbs psi psi % ms

-10.0 89 71.48 2643 3491 47069 9479 98.0 1.365
-09.0 90 72.27 2670 3562 48519 9568 98.3 1.346
-08.0 91 73.07 2696 3632 50011 9654 98.6 1.327
-07.0 92 73.86 2723 3703 51547 9737 98.8 1.309
-06.0 93 74.65 2749 3775 53128 9816 99.0 1.291
-05.0 94 75.45 2775 3847 54757 9891 99.2 1.273
-04.0 95 76.24 2801 3920 56434 9963 99.4 1.256 ! Near Maximum !
-03.0 96 77.04 2827 3992 58161 10032 99.5 1.239 ! Near Maximum !
-02.0 97 77.83 2853 4066 59940 10097 99.7 1.222 ! Near Maximum !
-01.0 98 78.63 2878 4139 61773 10158 99.8 1.206 ! Near Maximum !
+00.0 99 79.42 2904 4213 63661 10215 99.9 1.190 ! Near Maximum !
+01.0 100 80.21 2930 4288 65607 10268 99.9 1.174 !DANGEROUS LOAD-DO NOT USE!
+02.0 101 81.01 2955 4362 67613 10317 100.0 1.159 !DANGEROUS LOAD-DO NOT USE!
+03.0 102 81.80 2980 4437 69681 10363 100.0 1.144 !DANGEROUS LOAD-DO NOT USE!
+04.0 103 82.60 3005 4513 71813 10404 100.0 1.129 !DANGEROUS LOAD-DO NOT USE!
+05.0 104 83.39 3030 4588 74012 10444 100.0 1.114 !DANGEROUS LOAD-DO NOT USE!

Results caused by ± 10% powder lot-to-lot burning rate variation using nominal charge
Data for burning rate increased by 10% relative to nominal value:
+Ba 99 79.42 3002 4502 74255 9855 100.0 1.116 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 99 79.42 2762 3811 53152 10245 96.7 1.288

HUNTER

Cartridge : .338-375 Ruger
Bullet : .338, 225, Nosler AccuBond 54357
Useable Case Capaci: 88.955 grain H2O = 5.776 cm³
Cartridge O.A.L. L6: 3.550 inch = 90.17 mm
Barrel Length : 25.0 inch = 635.0 mm
Powder : Ramshot Hunter

Predicted data by increasing and decreasing the given charge,
incremented in steps of 1.0% of nominal charge.
CAUTION: Figures exceed maximum and minimum recommended loads !

Step Fill. Charge Vel. Energy Pmax Pmuz Prop.Burnt B_Time
% % Grains fps ft.lbs psi psi % ms

-10.0 87 73.93 2690 3614 46371 10053 99.1 1.373
-09.0 88 74.75 2717 3688 47873 10136 99.3 1.354
-08.0 89 75.57 2745 3763 49421 10215 99.5 1.334
-07.0 90 76.39 2772 3839 51018 10290 99.6 1.315
-06.0 91 77.21 2799 3914 52665 10360 99.8 1.296
-05.0 92 78.03 2826 3990 54363 10426 99.9 1.277
-04.0 93 78.85 2853 4067 56115 10487 99.9 1.259 ! Near Maximum !
-03.0 94 79.68 2880 4144 57922 10543 100.0 1.242 ! Near Maximum !
-02.0 95 80.50 2907 4221 59787 10594 100.0 1.224 ! Near Maximum !
-01.0 96 81.32 2933 4298 61711 10642 100.0 1.207 ! Near Maximum !
+00.0 97 82.14 2960 4376 63697 10688 100.0 1.190 ! Near Maximum !
+01.0 98 82.96 2986 4454 65747 10734 100.0 1.174 !DANGEROUS LOAD-DO NOT USE!
+02.0 99 83.78 3012 4532 67864 10779 100.0 1.158 !DANGEROUS LOAD-DO NOT USE!
+03.0 100 84.60 3038 4611 70049 10823 100.0 1.142 !DANGEROUS LOAD-DO NOT USE!
+04.0 101 85.43 3064 4690 72306 10866 100.0 1.126 !DANGEROUS LOAD-DO NOT USE!
+05.0 102 86.25 3090 4769 74638 10909 100.0 1.111 !DANGEROUS LOAD-DO NOT USE!

Results caused by ± 10% powder lot-to-lot burning rate variation using nominal charge
Data for burning rate increased by 10% relative to nominal value:
+Ba 97 82.14 3060 4678 75703 10304 100.0 1.110 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 97 82.14 2808 3940 51809 10914 98.0 1.298


RL17

Cartridge : .338-375 Ruger
Bullet : .338, 225, Nosler AccuBond 54357
Useable Case Capaci: 88.955 grain H2O = 5.776 cm³
Cartridge O.A.L. L6: 3.550 inch = 90.17 mm
Barrel Length : 25.0 inch = 635.0 mm
Powder : Alliant Reloder-17

Predicted data by increasing and decreasing the given charge,
incremented in steps of 1.0% of nominal charge.
CAUTION: Figures exceed maximum and minimum recommended loads !

Step Fill. Charge Vel. Energy Pmax Pmuz Prop.Burnt B_Time
% % Grains fps ft.lbs psi psi % ms

-10.0 81 69.68 2714 3679 47871 9579 100.0 1.338
-09.0 82 70.45 2739 3748 49362 9636 100.0 1.319
-08.0 83 71.23 2764 3817 50895 9692 100.0 1.301
-07.0 84 72.00 2789 3886 52478 9747 100.0 1.283
-06.0 85 72.77 2814 3956 54106 9802 100.0 1.266
-05.0 86 73.55 2839 4026 55785 9856 100.0 1.249 ! Near Maximum !
-04.0 86 74.32 2863 4096 57517 9910 100.0 1.233 ! Near Maximum !
-03.0 87 75.10 2888 4166 59301 9963 100.0 1.216 ! Near Maximum !
-02.0 88 75.87 2912 4236 61140 10015 100.0 1.200 ! Near Maximum !
-01.0 89 76.65 2936 4307 63036 10067 100.0 1.185 ! Near Maximum !
+00.0 90 77.42 2960 4378 64991 10118 100.0 1.169 !DANGEROUS LOAD-DO NOT USE!
+01.0 91 78.19 2984 4449 67000 10169 100.0 1.154 !DANGEROUS LOAD-DO NOT USE!
+02.0 92 78.97 3008 4520 69064 10218 100.0 1.139 !DANGEROUS LOAD-DO NOT USE!
+03.0 93 79.74 3032 4592 71187 10268 100.0 1.125 !DANGEROUS LOAD-DO NOT USE!
+04.0 94 80.52 3055 4664 73374 10316 100.0 1.110 !DANGEROUS LOAD-DO NOT USE!
+05.0 95 81.29 3079 4737 75628 10364 100.0 1.096 !DANGEROUS LOAD-DO NOT USE!

Results caused by ± 10% powder lot-to-lot burning rate variation using nominal charge
Data for burning rate increased by 10% relative to nominal value:
+Ba 90 77.42 3040 4618 76707 9815 100.0 1.098 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 90 77.42 2838 4024 53588 10538 99.8 1.265


VN560 looks really good as well Jake. Not sure if you can get your hands on it, but for this big guy, I don't imagine you will shoot a ton of it, and if it works, I would bet an 8lb jug would last awhile after you found a load.

Cartridge : .338-375 Ruger
Bullet : .338, 225, Nosler AccuBond 54357
Useable Case Capaci: 88.955 grain H2O = 5.776 cm³
Cartridge O.A.L. L6: 3.550 inch = 90.17 mm
Barrel Length : 25.0 inch = 635.0 mm
Powder : Vihtavuori N560

Predicted data by increasing and decreasing the given charge,
incremented in steps of 1.0% of nominal charge.
CAUTION: Figures exceed maximum and minimum recommended loads !

Step Fill. Charge Vel. Energy Pmax Pmuz Prop.Burnt B_Time
% % Grains fps ft.lbs psi psi % ms

-10.0 95 79.18 2734 3734 45582 11119 95.1 1.371
-09.0 96 80.06 2766 3822 47197 11247 95.6 1.349
-08.0 97 80.94 2798 3911 48873 11372 96.0 1.328
-07.0 98 81.82 2830 4001 50611 11492 96.5 1.307
-06.0 99 82.70 2862 4093 52418 11607 96.9 1.286
-05.0 100 83.58 2894 4185 54295 11717 97.3 1.266
-04.0 101 84.46 2926 4278 56245 11822 97.7 1.246 ! Near Maximum !
-03.0 102 85.34 2958 4372 58272 11922 98.0 1.226 ! Near Maximum !
-02.0 103 86.22 2990 4467 60379 12017 98.3 1.206 ! Near Maximum !
-01.0 104 87.10 3022 4562 62572 12106 98.6 1.188 ! Near Maximum !
+00.0 105 87.98 3054 4659 64852 12189 98.9 1.169 !DANGEROUS LOAD-DO NOT USE!
+01.0 106 88.86 3086 4757 67212 12266 99.1 1.151 !DANGEROUS LOAD-DO NOT USE!
+02.0 107 89.74 3117 4855 69658 12337 99.3 1.133 !DANGEROUS LOAD-DO NOT USE!
+03.0 108 90.62 3149 4954 72200 12402 99.5 1.115 !DANGEROUS LOAD-DO NOT USE!
+04.0 109 91.50 3181 5054 74842 12461 99.7 1.098 !DANGEROUS LOAD-DO NOT USE!
+05.0 110 92.38 3212 5155 77590 12513 99.8 1.081 !DANGEROUS LOAD-DO NOT USE!

Results caused by ± 10% powder lot-to-lot burning rate variation using nominal charge
Data for burning rate increased by 10% relative to nominal value:
+Ba 105 87.98 3198 5109 78982 11792 100.0 1.079 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 105 87.98 2853 4066 51810 11898 93.1 1.287

 

[jmad_81]

Thanks Scotty. I'll have to see how it compares to what I come up with.

Well I got to spend a little time developing some load data today. All loads were shot with the 225 sst, 215M, and a COAL of 3.500"

RL-22

78 2772
78 2801
79 2836
80 2892
81 2930
I screwed up when I was loading them and didn't want to pull one so I just shot two 78 grain laods. These five shots produced about a 4" group. I didn't get any pressure signs, so I think I can work up another grain or two.

Ramshot Magnum

83 no read
84 2699
85 2807
86 2830
87 2801
I'm thinking that this powder is to slow for the 225 in this round. The last three shots did produce a nice 3/4" group though.

H1000

80 2715
81 2766
82 2777
83 2789
84 2855
I'm not sure if I have enough room to try to load up a grain or two or not. It was looking pretty dang full.

I had been doing my barrel break in with some 7828. I didn't get a chance to do much of a ladder test with them as it was to early for the chrony to work when I shot them a few day prior. But I had shot from 79 up to 85 grains. Everything looked good on the cases and bolt lift. I had four rounds with me today that were loaded with 84 gr 7828.

7828
84 3051
84 3072
84 3065
I'm not sure how much more I can go up, but at this point I don't care. my goal for this round was to be able to push a 225 AB @ 3000 fps and shoot half MOA. The above load did about 1 MOA. I'm cleaning everything up good tonight and going out with some 225 AB loaded up with 82, 83, and 84 grains of 7828. We'll see what I come up with. The rifle doesn't have 50 rounds down it yet, and has not been bedded yet (I'm not sure how much bedding will help with the aluminum block that HS uses, but it couldn't hurt) so I'm not expecting anything .5 MOA yet. But 7828 has sure shown some potential to shoot .5 MOA in this gun.

If 7828 doesn't work out very well in the accuracy department, I'll give RL-22 a bit more attention. I might even have to take a look at some H4831. I have never used it for anything and I know alot of guys that like it. I'll have to double check on some burn rate charts, but I think its around RL-22?

 

[Oldtrader3]

Jmad, I would say that you are in the ballpark for max velocity in your .338/.375. My .340 Weatherby Mag ran right at 3080 fps with 88.0 grains of IMR 2878 SSC. That was my most accurate load as well at 200 yards. You are pretty close with less capacity. It looks like a good load to me.

 

[nvbroncrider]

Man that 7828 is some good stuff. I use it in my 280AI and it's a sub .5 MOA gun any day of the week and better when I do my part. How far are you off the lands? My rifle likes a .045" jump.

 

[SJB358]

7828 does look great Jake. Seems like it is meeting your accuracy and speed requirements, so I would see what it does all cleaned up... Looks like it was a short work up buddy. Nice shooting.

Cartridge : .338-375 Ruger
Bullet : .338, 225, Nosler AccuBond 54357
Useable Case Capaci: 84.167 grain H2O = 5.465 cm³
Cartridge O.A.L. L6: 3.340 inch = 84.84 mm
Barrel Length : 25.0 inch = 635.0 mm
Powder : IMR 7828 SSC

Predicted data by increasing and decreasing the given charge,
incremented in steps of 1.0% of nominal charge.
CAUTION: Figures exceed maximum and minimum recommended loads !

Step Fill. Charge Vel. Energy Pmax Pmuz Prop.Burnt B_Time
% % Grains fps ft.lbs psi psi % ms

-10.0 93 73.88 2620 3430 41862 10003 93.6 1.419
-09.0 94 74.70 2652 3513 43329 10128 94.2 1.396
-08.0 95 75.52 2683 3597 44851 10248 94.7 1.374
-07.0 96 76.34 2715 3683 46432 10365 95.2 1.352
-06.0 97 77.16 2747 3769 48075 10478 95.7 1.330
-05.0 98 77.99 2778 3857 49782 10586 96.2 1.309
-04.0 99 78.81 2810 3945 51556 10689 96.7 1.288
-03.0 100 79.63 2842 4035 53402 10788 97.1 1.267
-02.0 101 80.45 2874 4126 55321 10881 97.5 1.247 ! Near Maximum !
-01.0 102 81.27 2905 4217 57319 10969 97.8 1.227 ! Near Maximum !
+00.0 103 82.09 2937 4310 59399 11052 98.2 1.208 ! Near Maximum !
+01.0 104 82.91 2969 4404 61566 11129 98.5 1.188 ! Near Maximum !
+02.0 105 83.73 3001 4498 63825 11201 98.8 1.170 ! Near Maximum !
+03.0 106 84.55 3032 4594 66179 11267 99.0 1.151 !DANGEROUS LOAD-DO NOT USE!
+04.0 107 85.37 3064 4690 68634 11327 99.2 1.133 !DANGEROUS LOAD-DO NOT USE!
+05.0 108 86.19 3096 4787 71196 11380 99.4 1.115 !DANGEROUS LOAD-DO NOT USE!

Results caused by ± 10% powder lot-to-lot burning rate variation using nominal charge
Data for burning rate increased by 10% relative to nominal value:
+Ba 103 82.09 3087 4762 72375 10747 100.0 1.114 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 103 82.09 2732 3729 48157 10660 91.3 1.328