Home Forums Reloading Big Game Rifles 270 WSM 130 grain Barnes 130 grain TTSX loads

I have had these bullets for a while now and would like to try then in my old Sako in 270 WSM. I am thinking H4831. Any experiences would be appreciated.

Not 130s, but when I had a WSM, I had a lot of success with a stiff load of H4831sc. They were fast, flat, and accurate.

I used a pile of Magpro, RL22 and RL25 in my 270 WSM with 130's and 150's. All of them were easy speed makers and accurate as well.

H4831 doesn't look too darned bad though.

Cartridge : .270 WSM
Bullet : .277, 130, Barnes 'TTSX'BT 30276
Useable Case Capaci: 71.311 grain H2O = 4.630 cm³
Cartridge O.A.L. L6: 2.860 inch = 72.64 mm
Barrel Length : 24.0 inch = 609.6 mm
Powder : Hodgdon H4831 SC *T

Predicted data by increasing and decreasing the given charge,
incremented in steps of 0.746% 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

-07.5 93 62.00 2990 2581 49106 11831 94.9 1.239
-06.7 94 62.50 3015 2625 50365 11931 95.3 1.224
-06.0 95 63.00 3041 2669 51674 12029 95.6 1.210
-05.2 96 63.50 3066 2713 53012 12125 95.9 1.196
-04.5 96 64.00 3091 2758 54384 12218 96.3 1.182 ! Near Maximum !
-03.7 97 64.50 3116 2803 55789 12310 96.6 1.168 ! Near Maximum !
-03.0 98 65.00 3141 2849 57228 12398 96.9 1.155 ! Near Maximum !
-02.2 99 65.50 3167 2894 58703 12484 97.2 1.141 ! Near Maximum !
-01.5 99 66.00 3192 2941 60219 12567 97.4 1.128 ! Near Maximum !
-00.7 100 66.50 3217 2987 61777 12648 97.7 1.115 ! Near Maximum !
+00.0 101 67.00 3242 3034 63378 12725 98.0 1.102 !DANGEROUS LOAD-DO NOT USE!
+00.7 102 67.50 3267 3082 65023 12800 98.2 1.090 !DANGEROUS LOAD-DO NOT USE!
+01.5 102 68.00 3293 3129 66715 12871 98.4 1.077 !DANGEROUS LOAD-DO NOT USE!
+02.2 103 68.50 3318 3178 68454 12940 98.6 1.065 !DANGEROUS LOAD-DO NOT USE!
+03.0 104 69.00 3343 3226 70243 13006 98.8 1.053 !DANGEROUS LOAD-DO NOT USE!
+03.7 105 69.50 3368 3275 72084 13068 99.0 1.040 !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 67.00 3394 3325 75415 12554 100.0 1.023 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 101 67.00 3040 2668 51732 12257 91.8 1.206

Thank you very much.

I played around with 129 Barnes LRX’s in my Model 70 .270 WSM. I finally got a great load with it using Relaoder 23. Magpro is another great powder if you can’t get what you want with H4831SC.