270wby powder

[theddguide]

Hey fellas, I got my eye on a weatherby weathermark in 270wby and was wondering what powder you all prefer? I've got several 140gr btips to experiment with in hopes of using them for practice and the accubonds for hunting. My new nosler manual lists imr 7828 for best velocities but my main concern is temp stability. Any issues with that particular powder? Just wondering what I should keep my eyes open for; i have access to h1000 and a little retumbo but neither are listed in the new manual.

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[Johnly]

H1000 and RL26 would top my list.

 

[jimbires]

I've used IMR7828 / IMR7828sc in a couple different cartridges , it worked well for me . the way finding components is today , you need to buy what you can find that'll work . powder temp stability is always getting talked about . I don't think it's worth worrying about at normal hunting distances of out to 300 yards , or so . how far are you shooting ? you can put your info in a ballistic calculator and change the velocity , to simulate cold weather velocity drop . then see how much it affects your point of impact . a good calculator is ;

http://www.jbmballistics.com/cgi-bin/jbmtraj-5.1.cgi


Retumbo , is to slow of a powder , you can't get enough in the case .
H1000 , is going to be about 109% case fill at max load . this will be a compressed load . I don't like to work with more than about 105% .


the powders below should work in this application .

RL26 , N560 , RL25 , mag pro , IMR7828 /IMR7828sc , N565 , RL22 , WXR , ramshot magnum , RL19 , RL23 , RL16 , N555 , H4831 / H4831sc , win 780

 

[theddguide]

I've used IMR7828 / IMR7828sc in a couple different cartridges , it worked well for me . the way finding components is today , you need to buy what you can find that'll work . powder temp stability is always getting talked about . I don't think it's worth worrying about at normal hunting distances of out to 300 yards , or so . how far are you shooting ? you can put your info in a ballistic calculator and change the velocity , to simulate cold weather velocity drop . then see how much it affects your point of impact . a good calculator is ;

http://www.jbmballistics.com/cgi-bin/jbmtraj-5.1.cgi


Retumbo , is to slow of a powder , you can't get enough in the case .
H1000 , is going to be about 109% case fill at max load . this will be a compressed load . I don't like to work with more than about 105% .


the powders below should work in this application .

RL26 , N560 , RL25 , mag pro , IMR7828 /IMR7828sc , N565 , RL22 , WXR , ramshot magnum , RL19 , RL23 , RL16 , N555 , H4831 / H4831sc , win 780

I understand where you're coming from. I have a bunch of h4831sc and as I said access to h1000 and retumbo. Only thing is the new manual lists h4831 and is at the bottom (top of the page) as far as velocity goes with 140s. They're more or less 270win speeds. Id like to get at least 3200 with 140s considering I've read a lot of guys getting over 3300. It just doesn't appear the 4831s will do that according to the book.

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[jimbires]

you can't make a cartridge like a certain powder . you have to pick from what you're willing to work with . you can probably get 3200 FPS with the H4831's . IMR7828's is another 80 FPS over H4831's . H1000 makes 60 FPS more than the H4831's , then you have to deal with a compressed load 108.8% case fill at max pressure .

Cartridge : .270 Weath. Mag.
Bullet : .277, 140, Nosler BalTip 27140
Useable Case Capaci: 73.787 grain H2O = 4.791 cm³
Cartridge O.A.L. L6: 3.295 inch = 83.69 mm
Barrel Length : 26.0 inch = 660.4 mm
Powder : Hodgdon H1000 *T

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 87 58.48 2556 2031 30729 10075 89.5 1.618
-18.0 89 59.94 2627 2145 32969 10426 91.1 1.573
-16.0 91 61.40 2698 2262 35386 10762 92.6 1.529
-14.0 93 62.87 2769 2384 37995 11080 94.0 1.483
-12.0 96 64.33 2841 2510 40816 11378 95.2 1.432
-10.0 98 65.79 2913 2639 43868 11652 96.3 1.384
-08.0 100 67.25 2986 2771 47175 11902 97.3 1.337
-06.0 102 68.71 3058 2908 50764 12124 98.1 1.292
-04.0 104 70.18 3131 3047 54664 12317 98.8 1.248 ! Near Maximum !
-02.0 106 71.64 3203 3189 58913 12478 99.4 1.206 ! Near Maximum !
+00.0 109 73.10 3275 3334 63543 12606 99.7 1.166 !DANGEROUS LOAD-DO NOT USE!
+02.0 111 74.56 3347 3482 68603 12699 99.9 1.126 !DANGEROUS LOAD-DO NOT USE!
+04.0 113 76.02 3418 3632 74150 12756 100.0 1.088 !DANGEROUS LOAD-DO NOT USE!
+06.0 115 77.49 3489 3784 80238 12795 100.0 1.052 !DANGEROUS LOAD-DO NOT USE!
+08.0 117 78.95 3559 3938 86912 12828 100.0 1.016 !DANGEROUS LOAD-DO NOT USE!
+10.0 120 80.41 3630 4095 94346 12854 100.0 0.982 !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 109 73.10 3427 3651 77874 12062 100.0 1.074 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 109 73.10 3053 2898 51246 12475 94.7 1.285


retumbo needs 112.4% case fill to get max pressure .

Cartridge : .270 Weath. Mag.
Bullet : .277, 140, Nosler BalTip 27140
Useable Case Capaci: 73.787 grain H2O = 4.791 cm³
Cartridge O.A.L. L6: 3.295 inch = 83.69 mm
Barrel Length : 26.0 inch = 660.4 mm
Powder : Hodgdon Retumbo

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 90 61.52 2607 2113 30417 11021 93.6 1.633
-18.0 92 63.06 2681 2235 32670 11378 95.1 1.587
-16.0 94 64.60 2756 2360 35104 11705 96.5 1.540
-14.0 97 66.13 2830 2490 37740 12000 97.6 1.494
-12.0 99 67.67 2905 2623 40592 12258 98.5 1.442
-10.0 101 69.21 2979 2759 43687 12477 99.2 1.392
-08.0 103 70.75 3053 2898 47044 12654 99.7 1.344
-06.0 106 72.29 3127 3039 50693 12788 100.0 1.298
-04.0 108 73.82 3200 3182 54667 12878 100.0 1.253 ! Near Maximum !
-02.0 110 75.36 3272 3327 58997 12955 100.0 1.210 ! Near Maximum !
+00.0 112 76.90 3343 3474 63732 13027 100.0 1.169 !DANGEROUS LOAD-DO NOT USE!
+02.0 115 78.44 3413 3622 68913 13093 100.0 1.129 !DANGEROUS LOAD-DO NOT USE!
+04.0 117 79.98 3483 3772 74596 13153 100.0 1.090 !DANGEROUS LOAD-DO NOT USE!
+06.0 119 81.51 3553 3925 80844 13207 100.0 1.053 !DANGEROUS LOAD-DO NOT USE!
+08.0 121 83.05 3623 4080 87732 13254 100.0 1.017 !DANGEROUS LOAD-DO NOT USE!
+10.0 124 84.59 3692 4237 95349 13294 100.0 0.982 !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 112 76.90 3488 3782 79838 12471 100.0 1.071 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 112 76.90 3116 3018 50473 13486 98.1 1.297


here is a chart of powders highest velocity at the top . these would be considered max loads . start load work ups 4.0 grain below these listed charges . it looks like RL26 will be hard to beat velocity wise . also very hard to find .


Cartridge : .270 Weath. Mag.
Bullet : .277, 140, Nosler BalTip 27140
Useable Case Capaci: 73.787 grain H2O = 4.791 cm³
Cartridge O.A.L. L6: 3.295 inch = 83.69 mm
Barrel Length : 26.0 inch = 660.4 mm

Predicted Data for Indicated Charges of the Following Powders.
Matching Maximum Pressure: 63800 psi, or 439 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 !

Powder type Filling/Loading Ratio Charge Charge Vel. Prop.Burnt P max P muzz B_Time
% Grains Gramm fps % psi psi ms
--------------------------------- -----------------------------------------------------------------
ReloadSwiss RS 76 *C 105.2 77.0 4.99 3387 100.0 63800 13618 1.168 !DANGEROUS LOAD-DO NOT USE!
Vihtavuori N570 *C 108.7 77.9 5.05 3378 97.3 63800 14787 1.174 !DANGEROUS LOAD-DO NOT USE!
ReloadSwiss RS 80 *C 107.7 79.5 5.15 3351 99.2 63800 14148 1.183 !DANGEROUS LOAD-DO NOT USE!
Alliant Reloder-33 *C 110.0 81.2 5.26 3347 97.5 62945 14542 1.183 ! Near Maximum !
Alliant Reloder-26 *C 96.7 70.7 4.58 3315 100.0 63800 12689 1.193 !DANGEROUS LOAD-DO NOT USE!
Bofors RP30 107.8 73.3 4.75 3310 99.8 63800 13328 1.189 !DANGEROUS LOAD-DO NOT USE!
Norma MRP 2 *C 107.8 73.3 4.75 3310 99.8 63800 13328 1.189 !DANGEROUS LOAD-DO NOT USE!
Vihtavuori N560 *C 99.7 69.3 4.49 3308 99.4 63800 13378 1.178 !DANGEROUS LOAD-DO NOT USE!
PB Clermont PCL 517 102.4 74.4 4.82 3308 99.8 63800 13081 1.173 !DANGEROUS LOAD-DO NOT USE!
SNPE Vectan SP 12 102.3 74.2 4.81 3307 99.9 63800 13053 1.173 !DANGEROUS LOAD-DO NOT USE!
Norma MRP *C 97.8 69.4 4.50 3303 100.0 63800 12872 1.186 !DANGEROUS LOAD-DO NOT USE!
Alliant Reloder-25 *C 105.6 71.5 4.63 3301 100.0 63800 12369 1.176 !DANGEROUS LOAD-DO NOT USE!
Accurate MAGPRO 99.9 72.2 4.68 3299 98.5 63800 13498 1.186 !DANGEROUS LOAD-DO NOT USE!
IMR 7828 SSC 98.5 68.8 4.46 3298 99.6 63800 12947 1.168 !DANGEROUS LOAD-DO NOT USE!
IMR 7828 104.1 68.8 4.46 3298 99.6 63800 12947 1.168 !DANGEROUS LOAD-DO NOT USE!
ADI AR 2218 110.0 79.7 5.16 3291 96.3 58871 14775 1.200 ! Near Maximum !
ADI AR 2213 99.6 68.5 4.44 3286 99.5 63800 12853 1.165 !DANGEROUS LOAD-DO NOT USE!
Vihtavuori N565 *C 104.2 72.8 4.72 3283 99.5 63800 13198 1.199 !DANGEROUS LOAD-DO NOT USE!
ADI AP 2214 103.4 73.0 4.73 3282 99.7 63800 12649 1.163 !DANGEROUS LOAD-DO NOT USE!
Hodgdon H1000 *T 108.8 73.2 4.74 3279 99.7 63800 12612 1.164 !DANGEROUS LOAD-DO NOT USE!
ADI AR 2217 108.8 73.2 4.74 3279 99.7 63800 12612 1.164 !DANGEROUS LOAD-DO NOT USE!
Raufoss RA15 *C 99.9 68.7 4.45 3278 99.9 63800 12781 1.184 !DANGEROUS LOAD-DO NOT USE!
Alliant Reloder-22 *C 99.9 68.7 4.45 3278 99.9 63800 12781 1.184 !DANGEROUS LOAD-DO NOT USE!
Bofors RP5/NP ~approximation 99.9 68.7 4.45 3278 99.9 63800 12781 1.184 !DANGEROUS LOAD-DO NOT USE!
Bofors RP15 102.6 69.0 4.47 3277 99.9 63800 12803 1.185 !DANGEROUS LOAD-DO NOT USE!
Winchester WXR 102.6 69.0 4.47 3277 99.9 63800 12803 1.185 !DANGEROUS LOAD-DO NOT USE!
ReloadSwiss RS 70 *C 91.6 66.3 4.30 3270 100.0 63800 11996 1.176 !DANGEROUS LOAD-DO NOT USE!
Hodgdon Retumbo 110.0 75.2 4.87 3265 100.0 58607 12949 1.214 ! Near Maximum !
ADI AR 2225 110.0 75.2 4.87 3265 100.0 58607 12949 1.214 ! Near Maximum !
Ramshot Magnum 99.7 73.8 4.78 3254 100.0 63800 12147 1.182 !DANGEROUS LOAD-DO NOT USE!
Bofors RP5 NT *C ~approximation 103.3 71.6 4.64 3252 98.4 63800 12765 1.168 !DANGEROUS LOAD-DO NOT USE!
ReloadSwiss RS 60 *T 88.7 63.3 4.10 3251 100.0 63800 11481 1.179 !DANGEROUS LOAD-DO NOT USE!
Rottweil R905 101.3 68.4 4.43 3250 99.3 63800 12577 1.183 !DANGEROUS LOAD-DO NOT USE!
ADI AR 2209 96.6 65.3 4.23 3240 99.9 63800 12172 1.171 !DANGEROUS LOAD-DO NOT USE!
Alliant Reloder-19 *C 97.1 66.0 4.28 3237 99.9 63800 12227 1.179 !DANGEROUS LOAD-DO NOT USE!
Bofors RL16 TZ *C *T 92.7 61.4 3.98 3236 100.0 63800 11421 1.174 !DANGEROUS LOAD-DO NOT USE!
Alliant Reloder-16 *C *T 92.7 61.4 3.98 3236 100.0 63800 11421 1.174 !DANGEROUS LOAD-DO NOT USE!
Alliant Reloder-17 *T 87.8 62.7 4.06 3231 100.0 63800 11408 1.185 !DANGEROUS LOAD-DO NOT USE!
Elcho 17 87.8 62.7 4.06 3231 100.0 63800 11408 1.185 !DANGEROUS LOAD-DO NOT USE!
Bofors RP14 ~approximation 97.8 66.5 4.31 3230 99.9 63800 12141 1.180 !DANGEROUS LOAD-DO NOT USE!
PB Clermont PCL 518 93.4 65.6 4.25 3227 100.0 63800 11823 1.186 !DANGEROUS LOAD-DO NOT USE!
Hodgdon H414 87.6 63.0 4.08 3225 100.0 63800 11799 1.186 !DANGEROUS LOAD-DO NOT USE!
Winchester 760 87.6 63.0 4.08 3225 100.0 63800 11799 1.186 !DANGEROUS LOAD-DO NOT USE!
PB Clermont PCL 511 89.7 65.0 4.21 3223 100.0 63800 11738 1.186 !DANGEROUS LOAD-DO NOT USE!
Ramshot Hunter 92.7 65.1 4.22 3222 100.0 63800 11721 1.186 !DANGEROUS LOAD-DO NOT USE!
Alliant Reloder-23 *C *T 101.5 67.5 4.38 3221 100.0 63800 11364 1.194 !DANGEROUS LOAD-DO NOT USE!
Bofors RP36 ZT *C *T 101.5 67.5 4.38 3221 100.0 63800 11364 1.194 !DANGEROUS LOAD-DO NOT USE!
Vihtavuori N555 *C*T 98.4 65.6 4.25 3220 100.0 63800 11534 1.211 !DANGEROUS LOAD-DO NOT USE!
Vihtavuori 24N41 *C 110.0 79.7 5.16 3216 91.3 61978 13209 1.186 ! Near Maximum !
Hodgdon H4831 SC *T 98.4 67.6 4.38 3216 99.1 63800 12165 1.176 !DANGEROUS LOAD-DO NOT USE!
Hodgdon H4831 *T 102.3 67.6 4.38 3216 99.1 63800 12165 1.176 !DANGEROUS LOAD-DO NOT USE!
ReloadSwiss RS 62 91.1 64.9 4.21 3215 100.0 63800 11488 1.200 !DANGEROUS LOAD-DO NOT USE!
Raufoss RA4 95.2 64.8 4.20 3215 99.8 63800 11948 1.178 !DANGEROUS LOAD-DO NOT USE!
Norma 204 *C 92.2 64.8 4.20 3215 99.8 63800 11948 1.178 !DANGEROUS LOAD-DO NOT USE!
Bofors RP4 ~approximation 95.2 64.8 4.20 3215 99.8 63800 11948 1.178 !DANGEROUS LOAD-DO NOT USE!
Accurate LRT 110.0 79.5 5.15 3204 90.4 58261 13753 1.216 ! Near Maximum !
Vihtavuori N550 *C 89.7 62.3 4.04 3197 100.0 63800 11381 1.195 !DANGEROUS LOAD-DO NOT USE!
Hodgdon LVR 90.0 61.2 3.97 3196 100.0 63800 11239 1.186 !DANGEROUS LOAD-DO NOT USE!
Norma URP *C 92.3 62.1 4.02 3196 100.0 63800 11243 1.192 !DANGEROUS LOAD-DO NOT USE!

 

[theddguide]

Well I picked up my new rifle and it just so happened the shop had 4lbs of 7828ssc so I bought all of it as well.

On a side note, when I got it home I was checking it out and chambered a live round and found it awfully hard to push the bolt all the way forward to be able to close it. Not sure if it's a really stiff ejector or something to do with the extractor trying to get over the rim of the case. Anyone experience this with a new mark v?

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[Dr. Vette]

Factory ammo or a reload?
It makes all the difference.

 

[theddguide]

Factory ammo or a reload?
It makes all the difference.

It's factory weatherby ammo

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[jmad_81]

I ran a 270 Weatherby for a while. I had outstanding results with the 140 AB and 7828. I played around with the 150 ABLR with H1000, 7828, and RL-26, I couldn't seem to get it to shoot well. I also played with the RL-26 with the 140 AB. I was able to squeak out a bit more speed, but the 7828 shot quite a bit better so I just stuck with it. I think your heading down the right track.

 

[Dr. Vette]

Factory ammo or a reload?
It makes all the difference.

It's factory weatherby ammo

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Take one of the rounds, grab a black Sharpie, and color the belt as well as 1/8" forward of that. Also color the shoulder.

Once its dry, try and load it. The Sharpie will tell you where the problem lies.

 

[jimbires]

Well I picked up my new rifle and it just so happened the shop had 4lbs of 7828ssc so I bought all of it as well.

On a side note, when I got it home I was checking it out and chambered a live round and found it awfully hard to push the bolt all the way forward to be able to close it. Not sure if it's a really stiff ejector or something to do with the extractor trying to get over the rim of the case. Anyone experience this with a new mark v?

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that should be a good choice of powder . you're a lucky fella to get it so easy . did you clean the rifle ? I'd try giving it a cleaning , chamber and barrel .

 

[theddguide]

I noticed with the bolt out of the gun I takes a good bit of force to push the case onto the bolt face as if the extractor has a stiff spring or the angle on it isn't enough. Also there's a small set of lines left on the shoulder every time I chamber it. Are these tooling marks? Should I be concerned about it?

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[FOTIS]