.257 Weatherby - Finally

[TBASTIAN]

I'm still holding my breath, until I can get back out to the range to double check this load, but I may have finally found something that groups in my .257 Weatherby.

Just got back from the range, where I shot this three shot group at 107 yards, using 100 grain Hornady SP's, 73.5 grains of H1000, and Federal Gold Medal Match, Large Rifle Magnum primers. The group measured sub-1/2 MOA, at 0.41".

The folks at Weatherby suggested this bullet and weight...now for blacktail season!

 

[longwinters]

Ah! The sweet pic of success. Does this bullet and load give you any other ideas of what else might work? You know, eventually, you will get tired of shooting little bitty groups with this load and have to try something else. :lol:

Long

 

[JD338]

TBASTIAN

Nice shooting! 4 clicks to the right and you are ready to go. :grin:

JD338

 

[TBASTIAN]

Thanks, guys. The next bullet to try will be the 100 grain Partition...just need to get over to Bend when they have some seconds back in stock!

 

[Greg Nolan]

Excellent group.
I'm glad I'm not a Oregon Blacktail deer :wink:
What rifle are you shooting and what velocity?
Greg

 

[TBASTIAN]

It's a Mark V Fibermark, 26" barrel. This load is shooting just over 3,500 FPS.

 

[nitis]

I dont recall did you try the accubonds 110?

btw that is alot better group than I could hope to shoot thank goodness all my guns shoot better than me :wink:

 

[DrMike]

That is a sho' 'nough fine group. Congratulations. I should think that any deer at reasonable range will be going home with you.

 

[TBASTIAN]

Thanks. I did try the 110 Accubonds. I thought that I had found a pretty good load with RL19, that shot under an inch...the next trip to the range it opened up quite a bit. I'd like to be shooting the AccuBond or Partition, but I'll be sticking with the most accurate load, at least for this hunting season.

 

[DrMike]

TBASTIAN,

I have nothing bad to say about Hornady bullets. It is not unusual that the Interlock gives me the best accuracy on initial work. I certainly use they for break-in and volume shooting. They work well for me, and I have taken a fair number of deer using Hornacy bullets. I do appreciate Nosler ABs and PTs, however, and keep working on most of my rifles to find a load using these bullets that will give me accuracy as good or better than that with Hornady bullets. Usually, that is not a long search.

 

[FOTIS]

speed? here is what quickload says.

Cartridge : .257 Weath. Mag
Bullet : .257, 100, Hornady SP 2540
Cartridge O.A.L. L6: 3.170 inch or 80.52 mm
Barrel Length : 22.0 inch or 558.8 mm
Powder : Hodgdon H1000

Predicted data by increasing and decreasing the given charge,
incremented in steps of 3.0% 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

-30.0 71 51.45 2235 1109 20461 9880 73.2 1.641
-27.0 74 53.66 2332 1208 22636 10674 76.3 1.583
-24.0 77 55.86 2434 1315 25051 11477 79.5 1.526
-21.0 80 58.07 2539 1431 27734 12278 82.5 1.471
-18.0 83 60.27 2647 1555 30718 13067 85.4 1.417
-15.0 87 62.48 2757 1688 34039 13834 88.1 1.364
-12.0 90 64.68 2870 1828 37743 14568 90.6 1.308
-09.0 93 66.89 2984 1977 41878 15256 92.9 1.243
-06.0 96 69.09 3099 2132 46506 15888 94.9 1.181
-03.0 99 71.30 3215 2295 51695 16451 96.6 1.123
+00.0 102 73.50 3332 2465 57529 16936 98.0 1.067 ! Near Maximum !
+03.0 105 75.71 3448 2640 64107 17332 99.0 1.015 !DANGEROUS LOAD-DO NOT USE!
+06.0 108 77.91 3565 2821 71548 17629 99.7 0.964 !DANGEROUS LOAD-DO NOT USE!
+09.0 111 80.12 3680 3007 79997 17818 100.0 0.916 !DANGEROUS LOAD-DO NOT USE!
+12.0 114 82.32 3795 3197 89630 17921 100.0 0.871 !DANGEROUS LOAD-DO NOT USE!
+15.0 117 84.53 3908 3391 100581 18004 100.0 0.827 !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 73.50 3522 2754 70374 16675 100.0 0.977 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 102 73.50 3078 2103 46408 16013 90.2 1.181

 

[FOTIS]

speed? here is what quickload says.

Cartridge : .257 Weath. Mag
Bullet : .257, 100, Hornady SP 2540
Cartridge O.A.L. L6: 3.170 inch or 80.52 mm
Barrel Length : 26.0 inch or 660.4 mm
Powder : Hodgdon H1000

Predicted data by increasing and decreasing the given charge,
incremented in steps of 3.0% 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

-30.0 71 51.45 2383 1260 20461 8726 77.3 1.786
-27.0 74 53.66 2486 1373 22636 9380 80.4 1.721
-24.0 77 55.86 2593 1493 25051 10031 83.4 1.659
-21.0 80 58.07 2703 1622 27734 10669 86.2 1.598
-18.0 83 60.27 2814 1759 30718 11285 88.8 1.539
-15.0 87 62.48 2928 1903 34039 11871 91.3 1.481
-12.0 90 64.68 3042 2055 37743 12417 93.5 1.421
-09.0 93 66.89 3158 2214 41878 12915 95.4 1.351
-06.0 96 69.09 3273 2379 46506 13356 97.0 1.286
-03.0 99 71.30 3389 2551 51695 13731 98.3 1.224
+00.0 102 73.50 3504 2727 57529 14033 99.2 1.165 ! Near Maximum !
+03.0 105 75.71 3619 2908 64107 14255 99.8 1.109 !DANGEROUS LOAD-DO NOT USE!
+06.0 108 77.91 3732 3093 71548 14391 100.0 1.056 !DANGEROUS LOAD-DO NOT USE!
+09.0 111 80.12 3844 3281 79997 14471 100.0 1.005 !DANGEROUS LOAD-DO NOT USE!
+12.0 114 82.32 3955 3473 89630 14539 100.0 0.957 !DANGEROUS LOAD-DO NOT USE!
+15.0 117 84.53 4064 3668 100581 14591 100.0 0.911 !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 73.50 3683 3011 70374 13580 100.0 1.070 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 102 73.50 3255 2353 46408 13598 93.0 1.286

 

[GB300wm]

Way to go TB. It sure feels good to have confidence in your rifle and to know that it will do everything that you ask it too. Go get them blacktail deer now. :grin:

 

[GB300wm]

Forgot to mention that I have really great accuracy with the 110 nab and IMR 7828. All loads that I tested with this bullet were acceptable and under 1 moa. :grin: :grin: