280 Ackley SAAMI spec chamber pressure confusion...

Most places you find it quoted say the 280 and the 280 Ackley are rated to the same pressure...SAAMI says that is not the case.

See page 6...
http://www.saami.org/specifications_and ... re_CfR.pdf

Hodgdens online data for the AI appears to be loaded very weak as are most others....Noslers online data looks to be good to go.


Just posting for the sake of getting it out there so the data may someday be "right" from all sources....for those that don't want to read, the 280 Ackley is SAAMI spec'd at 65,000 psi....the 280 Remington is 60,000 psi.

The 5K psi doesn't increase velocity as much as you might imagine on that portion of the pressure trace.

The .280 Rem charged wit6h RL22 propelling a 150 ABLR generates a velocity of 3003 fps. For 1.3 more grains, allowing for a 65K psi max chamber pressure, you gain 71 fps. In the real world, that is negligible. Undoubtedly, there is someone who can make a case for the need of an additional 71 fps, but for the overwhelming majority of shooters, it is a non-issue, though few know that it is a non-issue.

I know you're right...

I've just been reading up a little on the Ackley, and noticed most sources stopped way short of MAP...I'm hoping I can stay away from RL 22, lost interest in that powder on a hot day with a 300 WM years ago...

If I can get 2,900 fps with a 160 grain AB...I'll be happy as a kid in a candy store...probably gonna try RL 19, maybe some of that new MR-4000 from Alliant too.

Ridgerunner665":31n52w6p said:

I know you're right...

I've just been reading up a little on the Ackley, and noticed most sources stopped way short of MAP...I'm hoping I can stay away from RL 22, lost interest in that powder on a hot day with a 300 WM years ago...

If I can get 2,900 fps with a 160 grain AB...I'll be happy as a kid in a candy store...probably gonna try RL 19, maybe some of that new MR-4000 from Alliant too.

Click to expand...

Easy 7828SSC or MRP. You should be between 2950-3050.

Cartridge : .280 Ack Imp
Bullet : .284, 160, Nosler AccuBond 54932
Useable Case Capaci: 64.314 grain H2O = 4.176 cm³
Cartridge O.A.L. L6: 3.330 inch = 84.58 mm
Barrel Length : 24.0 inch = 609.6 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 !

22 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 63.4 4.11 3052 100.0 64000 12707 1.153 ! Near Maximum !
Vihtavuori N560 104.2 63.1 4.09 3047 98.6 64000 13076 1.148 ! Near Maximum !
Accurate MAGPRO 104.5 65.8 4.27 3038 97.5 64000 13161 1.154 ! Near Maximum !
Alliant Reloder-25 110.0 64.9 4.20 3037 100.0 62757 12181 1.152 ! Near Maximum !
IMR 7828 108.8 62.7 4.06 3034 99.0 64000 12642 1.138 ! Near Maximum !
IMR 7828 SSC 102.9 62.7 4.06 3034 99.0 64000 12642 1.138 ! Near Maximum !
Alliant Reloder-22 104.5 62.6 4.06 3023 99.6 64000 12551 1.154 ! Near Maximum !
Winchester WXR 107.3 62.9 4.08 3022 99.6 64000 12569 1.154 ! Near Maximum !
Ramshot Magnum 104.2 67.3 4.36 3004 99.9 64000 11966 1.146 ! Near Maximum !
Alliant Reloder-17 91.9 57.2 3.70 2985 100.0 64000 11190 1.156 ! Near Maximum !
Vihtavuori N570 110.0 68.8 4.46 2979 93.9 55925 13907 1.212 ! Near Maximum !
Alliant Reloder-19 101.3 60.0 3.89 2978 99.5 64000 11960 1.152 ! Near Maximum !
Ramshot Hunter 96.8 59.3 3.84 2969 100.0 64000 11515 1.159 ! Near Maximum !
Hodgdon H414 91.4 57.3 3.71 2968 100.0 64000 11572 1.161 ! Near Maximum !
Winchester 760 91.4 57.3 3.71 2968 100.0 64000 11572 1.161 ! Near Maximum !
Norma MRP 2 110.0 65.2 4.23 2967 98.6 57717 12883 1.207 ! Near Maximum !
Norma 204 96.1 58.8 3.81 2954 99.4 64000 11655 1.153 ! Near Maximum !
Hodgdon H4831 SC 102.4 61.4 3.98 2954 98.3 64000 11818 1.150 ! Near Maximum !
Hodgdon H4831 106.6 61.4 3.98 2954 98.3 64000 11818 1.150 ! Near Maximum !
Vihtavuori N550 93.6 56.7 3.67 2946 100.0 64000 11155 1.170 ! Near Maximum !
Norma URP 96.3 56.5 3.66 2945 100.0 64000 11013 1.166 ! Near Maximum !
Accurate 4350 95.4 56.6 3.67 2940 100.0 64000 10964 1.183 ! Near Maximum !
Winchester Supreme 780 99.8 62.4 4.04 2930 99.4 64000 11358 1.158 ! Near Maximum !
IMR 4831 101.1 57.4 3.72 2926 100.0 64000 10771 1.175 ! Near Maximum !
Accurate 3100 104.5 62.0 4.02 2925 100.0 64000 11033 1.186 ! Near Maximum !
Vihtavuori N165 106.7 62.6 4.06 2925 99.7 64000 11142 1.163 ! Near Maximum !
Hodgdon H4350 98.8 57.3 3.71 2915 99.8 64000 10999 1.158 ! Near Maximum !
IMR 4350 97.0 57.2 3.71 2914 99.9 64000 10974 1.158 ! Near Maximum !
Hodgdon H1000 110.0 64.5 4.18 2910 98.1 57261 12081 1.194 ! Near Maximum !
Vihtavuori N160 106.8 60.7 3.93 2909 98.7 64000 11178 1.158 ! Near Maximum !
Hodgdon Hybrid 100V 98.9 56.7 3.67 2900 100.0 64000 10152 1.168 ! Near Maximum !
IMR 4007 SSC 91.1 54.8 3.55 2895 99.8 64000 10842 1.167 ! Near Maximum !
Accurate 2700 91.2 56.4 3.66 2849 99.8 64000 10253 1.171 ! Near Maximum !

Those velocities should be eminently doable.

Thank You DrMike!

MRP looks interesting...been reading about it too.

Ridgerunner665":309x0o6p said:

I'm hoping I can stay away from RL 22, lost interest in that powder on a hot day with a 300 WM years ago... probably gonna try RL 19...

Click to expand...

From what I've seen RLs -19 & -22 are about the same with regards to temp issues.

No idea where 7828 ranks in that sense.

This thread is quite helpful; thanks Mike for that posting. Would you be willing to do that same calculation with the 168 gr Custom Comp? I am playing with that one currently in my 22" barreled Win 70 FW.

Good stuff guys keep it coming!

efw":3hek0bsb said:

Ridgerunner665":3hek0bsb said:

I'm hoping I can stay away from RL 22, lost interest in that powder on a hot day with a 300 WM years ago... probably gonna try RL 19...

Click to expand...

From what I've seen RLs -19 & -22 are about the same with regards to temp issues.

No idea where 7828 ranks in that sense.

This thread is quite helpful; thanks Mike for that posting. Would you be willing to do that same calculation with the 168 gr Custom Comp? I am playing with that one currently in my 22" barreled Win 70 FW.

Good stuff guys keep it coming!

Click to expand...

Well crap...I've used it in 243 and didn't notice anything, but different cases cause different behavior.

Wonder if H4831sc could get me there without beating up the brass?

That's the slowest powder on the list that I know for a fact is pretty stable, lol.

Ramshot Hunter?

Decision made...Ramshot Magnum is the powder I'm gonna try first...found a test Barnes did with it in the 300 WM...its almost as stable as Varget, and much more so than 7828 or RL 22.

About halfway down the page... http://www.barnesbullets.com/resources/ ... -bullet-n/

I LOVE Hunter but from what John Barsness has said it's somewhat temp sensitive. The way I've addressed that in my loading is to try and develop loads that aren't hot, and to do so in warmer weather. Haven't done a ton of shooting of those loads in really hot weather either, but even the most stable powders will react poorly on a 100 degree day when yer shooting in direct sunlight and yer rifle/ammo just came out of a shut-up car.

You're right though; my eye was drawn to H-4831 for that reason. It's easy to get greedy when I see 150 fps more but you're absolutely right when you say 2900 fps would be awesome.

Great info on Ramshot Magnum! Thanks for that! I have some I was thinking about using w/ my 168 gr Custom Comps. Very surprised that it wasn't closer to the top on that velocity chart.

I just emailed Ramshot asking if they had any plans to offer load data on the 280 Ackley...bragged on Magnum and Hunter a little too while I was at it.

efw":94bzxly9 said:

Would you be willing to do that same calculation with the 168 gr Custom Comp? I am playing with that one currently in my 22" barreled Win 70 FW.

Click to expand...

Cartridge : .280 Ack Imp
Bullet : .284, 168, Nosler CC HPBT 53418
Useable Case Capaci: 66.234 grain H2O = 4.300 cm³
Cartridge O.A.L. L6: 3.330 inch = 84.58 mm
Barrel Length : 22.0 inch = 558.8 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 !

30 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
--------------------------------- -----------------------------------------------------------------
Vihtavuori N570 110.0 70.8 4.59 2945 95.3 61140 16165 1.133 ! Near Maximum !
Alliant Reloder-25 108.1 65.6 4.25 2929 100.0 64000 13840 1.112 ! Near Maximum !
Norma MRP 100.1 63.8 4.13 2926 100.0 64000 14387 1.123 ! Near Maximum !
Vihtavuori N560 101.9 63.6 4.12 2925 98.7 64000 14817 1.117 ! Near Maximum !
Norma MRP 2 110.0 67.2 4.35 2922 99.3 63273 14831 1.130 ! Near Maximum !
Alliant Reloder-33 110.0 73.8 4.78 2921 95.5 60479 15931 1.139 ! Near Maximum !
Accurate MAGPRO 102.1 66.3 4.30 2917 97.6 64000 14931 1.123 ! Near Maximum !
IMR 7828 106.4 63.1 4.09 2916 99.0 64000 14356 1.106 ! Near Maximum !
IMR 7828 SSC 100.7 63.1 4.09 2916 99.0 64000 14356 1.106 ! Near Maximum !
Alliant Reloder-22 102.1 63.0 4.09 2901 99.6 64000 14214 1.122 ! Near Maximum !
Winchester WXR 104.9 63.4 4.11 2900 99.6 64000 14236 1.123 ! Near Maximum !
Ramshot Magnum 101.9 67.8 4.39 2886 99.9 64000 13603 1.116 ! Near Maximum !
Hodgdon H1000 110.0 66.4 4.30 2868 98.9 61835 13939 1.119 ! Near Maximum !
Alliant Reloder-19 99.1 60.5 3.92 2861 99.6 64000 13549 1.119 ! Near Maximum !
Ramshot Hunter 94.6 59.7 3.87 2850 100.0 64000 13037 1.126 ! Near Maximum !
Hodgdon H4831 SC 100.3 61.9 4.01 2841 98.4 64000 13417 1.115 ! Near Maximum !
Hodgdon H4831 104.4 61.9 4.01 2841 98.4 64000 13417 1.115 ! Near Maximum !
Norma 204 94.1 59.3 3.84 2839 99.4 64000 13212 1.119 ! Near Maximum !
Vihtavuori N550 91.5 57.1 3.70 2827 100.0 64000 12619 1.136 ! Near Maximum !
Norma URP 94.2 56.9 3.69 2827 100.0 64000 12470 1.133 ! Near Maximum !
Accurate 4350 93.3 56.9 3.69 2821 100.0 64000 12427 1.150 ! Near Maximum !
Winchester Supreme 780 97.8 62.9 4.08 2818 99.5 64000 12892 1.124 ! Near Maximum !
Vihtavuori N165 104.5 63.1 4.09 2812 99.8 64000 12655 1.128 ! Near Maximum !
IMR 4831 98.8 57.8 3.74 2810 100.0 64000 12208 1.141 ! Near Maximum !
Accurate 3100 102.2 62.4 4.04 2809 100.0 64000 12520 1.153 ! Near Maximum !
Hodgdon H4350 96.8 57.8 3.75 2802 99.9 64000 12475 1.122 ! Near Maximum !
IMR 4350 95.0 57.7 3.74 2802 99.9 64000 12446 1.122 ! Near Maximum !
Vihtavuori N160 104.6 61.3 3.97 2799 98.8 64000 12701 1.122 ! Near Maximum !
Hodgdon Hybrid 100V 96.6 57.1 3.70 2784 100.0 64000 11521 1.134 ! Near Maximum !
Vihtavuori 24N41 110.0 71.5 4.64 2760 87.6 57313 14020 1.165 ! Near Maximum !
Vihtavuori N170 110.0 66.4 4.30 2711 92.4 56194 13314 1.205 ! Near Maximum !

Ridgerunner665":331yi3tv said:

Wonder if H4831sc could get me there without beating up the brass?

That's the slowest powder on the list that I know for a fact is pretty stable, lol.

Ramshot Hunter?

Click to expand...

IMR 7828 is single based so therefore not as temp. sensitive as the double based powders. I can deal with temp. sensitivity, what ended my love affair with RE 22 is the lot to lot variences. Ramshot powders are double based and more temp. sensative than the single based powders. If you want temp. stable powders check the labels, if it says nitrocellulose, its single based, if it says nitroculose and nitroglycerine then its double based. I shoot some double based powders, work up your load in hot weather, then check your velocity, when it gets cold bump your charge up till it matches that velocity, just keep your summer and winter loads segregated. I don't see much difference in them till it gets above 60 degrees.
RR

Ridgerunner665":3ogkk7d1 said:

I just emailed Ramshot asking if they had any plans to offer load data on the 280 Ackley...bragged on Magnum and Hunter a little too while I was at it.

Click to expand...

PM me your email address and I'll send you what they sent me. Unfortunately they didn't include anything for Magnum <170 gr bullets. They did send me Hunter data for the whole gambit of 7mm offerings bullet-wise.

Norma MRP seems like it would be really good in the 280 Ackley. It is doing really well in my 7mm Rem Mag. I am not sure it is any more stable than RL22, but I am hoping it is a little more consistent across lots of powder. I still use plenty of RL22 though. As long as you know what your working with, it hasn't been troublesome for me and has always smoked H4831 for speed and accuracy.

efw":rxqse95y said:

Ridgerunner665":rxqse95y said:

I just emailed Ramshot asking if they had any plans to offer load data on the 280 Ackley...bragged on Magnum and Hunter a little too while I was at it.

Click to expand...

PM me your email address and I'll send you what they sent me. Unfortunately they didn't include anything for Magnum <170 gr bullets. They did send me Hunter data for the whole gambit of 7mm offerings bullet-wise.

Click to expand...

I think I saw the info you speak of posted somewhere here on the forum...

And after more research I think Magnum is just a little too slow burning for this round....Hunter is just a little too fast for heavy bullets...

Back to the drawing board...

FWIW, Nosler uses MRP in their 280 AI ammunition.
I have used a lot of RL 22 and have not had any temp issues but I do my load development in the summer time.

JD338

Can I get a QuickLoad rundown for MRP, 7828ssc, and 4831sc?

24 inch barrel, Nosler brass

Cartridge : .280 Ack Imp
Bullet : .284, 168, Nosler AccuBond LR 58623 G7
Useable Case Capaci: 63.532 grain H2O = 4.125 cm³
Cartridge O.A.L. L6: 3.330 inch = 84.58 mm
Barrel Length : 24.0 inch = 609.6 mm
Powder : Norma MRP

Predicted data by increasing and decreasing the given charge,
incremented in steps of 2.0% 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

-20.0 81 49.60 2364 2084 31636 10293 93.6 1.615
-18.0 83 50.84 2426 2195 33888 10605 94.8 1.573
-16.0 85 52.08 2487 2308 36307 10900 95.9 1.531
-14.0 87 53.32 2549 2424 38908 11177 96.8 1.482
-12.0 89 54.56 2611 2543 41708 11434 97.7 1.434
-10.0 91 55.80 2672 2664 44723 11670 98.4 1.388
-08.0 93 57.04 2734 2788 47975 11882 99.0 1.344
-06.0 95 58.28 2795 2914 51483 12070 99.4 1.301
-04.0 97 59.52 2856 3042 55273 12232 99.8 1.260 ! Near Maximum !
-02.0 99 60.76 2916 3172 59335 12367 99.9 1.220 ! Near Maximum !
+00.0 101 62.00 2976 3304 63695 12474 100.0 1.182 ! Near Maximum !
+02.0 103 63.24 3035 3437 68391 12567 100.0 1.145 !DANGEROUS LOAD-DO NOT USE!
+04.0 106 64.48 3094 3572 73456 12655 100.0 1.110 !DANGEROUS LOAD-DO NOT USE!
+06.0 108 65.72 3153 3708 78927 12738 100.0 1.075 !DANGEROUS LOAD-DO NOT USE!
+08.0 110 66.96 3211 3846 84845 12816 100.0 1.043 !DANGEROUS LOAD-DO NOT USE!
+10.0 112 68.20 3269 3987 91258 12889 100.0 1.011 !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 101 62.00 3099 3583 78167 11959 100.0 1.090 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 101 62.00 2790 2905 50144 12637 96.9 1.306

Cartridge : .280 Ack Imp
Bullet : .284, 168, Nosler AccuBond LR 58623 G7
Useable Case Capaci: 63.532 grain H2O = 4.125 cm³
Cartridge O.A.L. L6: 3.330 inch = 84.58 mm
Barrel Length : 24.0 inch = 609.6 mm
Powder : IMR 7828 SSC

Predicted data by increasing and decreasing the given charge,
incremented in steps of 2.0% 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

-20.0 82 49.12 2340 2042 32077 9878 89.5 1.594
-18.0 84 50.35 2402 2152 34323 10210 91.0 1.552
-16.0 86 51.58 2464 2264 36733 10530 92.3 1.511
-14.0 88 52.80 2526 2381 39320 10837 93.5 1.462
-12.0 90 54.03 2589 2500 42100 11128 94.7 1.414
-10.0 92 55.26 2651 2623 45089 11402 95.7 1.369
-08.0 94 56.49 2714 2748 48308 11657 96.6 1.325
-06.0 96 57.72 2777 2877 51776 11892 97.5 1.283
-04.0 98 58.94 2840 3008 55518 12105 98.2 1.242 ! Near Maximum !
-02.0 100 60.17 2903 3143 59561 12295 98.8 1.203 ! Near Maximum !
+00.0 102 61.40 2965 3280 63936 12460 99.2 1.165 ! Near Maximum !
+02.0 104 62.63 3027 3419 68673 12599 99.6 1.128 !DANGEROUS LOAD-DO NOT USE!
+04.0 106 63.86 3090 3561 73817 12710 99.9 1.093 !DANGEROUS LOAD-DO NOT USE!
+06.0 108 65.08 3151 3705 79412 12793 100.0 1.059 !DANGEROUS LOAD-DO NOT USE!
+08.0 110 66.31 3213 3851 85505 12848 100.0 1.026 !DANGEROUS LOAD-DO NOT USE!
+10.0 112 67.54 3274 3999 92161 12894 100.0 0.994 !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 61.40 3102 3589 77978 11984 100.0 1.076 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 102 61.40 2771 2864 51653 12233 93.7 1.280

Cartridge : .280 Ack Imp
Bullet : .284, 168, Nosler AccuBond LR 58623 G7
Useable Case Capaci: 63.532 grain H2O = 4.125 cm³
Cartridge O.A.L. L6: 3.330 inch = 84.58 mm
Barrel Length : 24.0 inch = 609.6 mm
Powder : Hodgdon H4831 SC

Predicted data by increasing and decreasing the given charge,
incremented in steps of 2.0% 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

-20.0 81 48.16 2299 1972 32632 9185 89.3 1.595
-18.0 83 49.36 2357 2073 34879 9485 90.6 1.553
-16.0 85 50.57 2416 2177 37285 9777 91.8 1.512
-14.0 87 51.77 2474 2284 39862 10060 92.9 1.463
-12.0 89 52.98 2533 2393 42623 10331 94.0 1.417
-10.0 92 54.18 2592 2506 45588 10591 95.0 1.373
-08.0 94 55.38 2651 2621 48769 10838 95.9 1.331
-06.0 96 56.59 2710 2739 52190 11070 96.7 1.290
-04.0 98 57.79 2769 2860 55869 11286 97.4 1.251 ! Near Maximum !
-02.0 100 59.00 2828 2983 59804 11486 98.1 1.213 ! Near Maximum !
+00.0 102 60.20 2887 3109 64024 11668 98.6 1.176 ! Near Maximum !
+02.0 104 61.40 2946 3238 68570 11831 99.1 1.141 !DANGEROUS LOAD-DO NOT USE!
+04.0 106 62.61 3005 3368 73474 11974 99.5 1.106 !DANGEROUS LOAD-DO NOT USE!
+06.0 108 63.81 3064 3502 78771 12095 99.7 1.073 !DANGEROUS LOAD-DO NOT USE!
+08.0 110 65.02 3122 3637 84504 12194 99.9 1.041 !DANGEROUS LOAD-DO NOT USE!
+10.0 112 66.22 3181 3774 90721 12269 100.0 1.010 !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 60.20 3013 3388 76255 11387 100.0 1.093 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 102 60.20 2714 2749 52231 11364 93.1 1.284

Cartridge : .280 Ack Imp
Bullet : .284, 168, Nosler AccuBond LR 58623 G7
Useable Case Capaci: 63.532 grain H2O = 4.125 cm³
Cartridge O.A.L. L6: 3.330 inch = 84.58 mm
Barrel Length : 24.0 inch = 609.6 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 !

22 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
--------------------------------- -----------------------------------------------------------------
Alliant Reloder-25 109.7 63.9 4.14 2981 100.0 64000 11993 1.169 ! Near Maximum !
Norma MRP 101.6 62.1 4.02 2980 100.0 64000 12481 1.179 ! Near Maximum !
Vihtavuori N560 103.4 61.9 4.01 2978 99.0 64000 12898 1.174 ! Near Maximum !
Accurate MAGPRO 103.7 64.5 4.18 2971 98.0 64000 13004 1.180 ! Near Maximum !
IMR 7828 107.9 61.4 3.98 2966 99.3 64000 12462 1.165 ! Near Maximum !
IMR 7828 SSC 102.1 61.4 3.98 2966 99.3 64000 12462 1.165 ! Near Maximum !
Alliant Reloder-22 103.7 61.4 3.98 2953 99.8 64000 12353 1.180 ! Near Maximum !
Winchester WXR 106.4 61.7 4.00 2952 99.7 64000 12375 1.181 ! Near Maximum !
Vihtavuori N570 110.0 67.9 4.40 2946 95.1 57669 13911 1.221 ! Near Maximum !
Ramshot Magnum 103.4 65.9 4.27 2936 100.0 64000 11775 1.173 ! Near Maximum !
Norma MRP 2 110.0 64.4 4.17 2928 99.2 59631 12778 1.217 ! Near Maximum !
Alliant Reloder-33 110.0 70.8 4.59 2921 95.2 56970 13718 1.228 ! Near Maximum !
Alliant Reloder-17 91.1 56.0 3.63 2911 100.0 64000 10983 1.183 ! Near Maximum !
Alliant Reloder-19 100.5 58.9 3.81 2909 99.7 64000 11775 1.179 ! Near Maximum !
Ramshot Hunter 96.0 58.1 3.76 2898 100.0 64000 11306 1.186 ! Near Maximum !
Winchester 760 90.7 56.2 3.64 2897 100.0 64000 11357 1.187 ! Near Maximum !
Hodgdon H414 90.7 56.2 3.64 2897 100.0 64000 11357 1.187 ! Near Maximum !
Hodgdon H4831 105.8 60.2 3.90 2887 98.6 64000 11668 1.176 ! Near Maximum !
Hodgdon H4831 SC 101.7 60.2 3.90 2887 98.6 64000 11668 1.176 ! Near Maximum !
Norma 204 95.3 57.7 3.74 2886 99.6 64000 11477 1.180 ! Near Maximum !
Vihtavuori N550 92.8 55.6 3.60 2874 100.0 64000 10952 1.197 ! Near Maximum !
Norma URP 95.5 55.3 3.59 2873 100.0 64000 10809 1.193 ! Near Maximum !
Hodgdon H1000 110.0 63.7 4.13 2871 98.8 58833 11996 1.206 ! Near Maximum !
Accurate 4350 94.6 55.4 3.59 2868 100.0 64000 10756 1.211 ! Near Maximum !
Winchester Supreme 780 99.1 61.2 3.96 2863 99.6 64000 11194 1.185 ! Near Maximum !
Vihtavuori N165 105.9 61.4 3.98 2857 99.9 64000 10965 1.189 ! Near Maximum !
Accurate 3100 103.7 60.7 3.94 2856 100.0 64000 10834 1.213 ! Near Maximum !
IMR 4831 100.2 56.2 3.64 2855 100.0 64000 10572 1.202 ! Near Maximum !
Hodgdon H4350 98.1 56.2 3.64 2846 99.9 64000 10814 1.185 ! Near Maximum !
IMR 4350 96.3 56.1 3.63 2845 99.9 64000 10787 1.185 ! Near Maximum !
Vihtavuori N160 106.0 59.5 3.86 2843 99.0 64000 11025 1.184 ! Near Maximum !
Hodgdon Hybrid 100V 98.0 55.5 3.60 2828 100.0 64000 9964 1.195 ! Near Maximum !
IMR 4007 SSC 90.4 53.7 3.48 2826 99.9 64000 10657 1.194 ! Near Maximum !
Accurate 2700 90.6 55.3 3.59 2782 99.9 64000 10083 1.198 ! Near Maximum !