QL Data for 270WSM and Hornady 120gr SST & 130gr Nosler BT?

[Guest]

I'm looking at this for a reduced load for my son's rifle. Thinking the 120gr SST or 130gr BT over H4895 would be great, at around 2500-2600fps or so. His rifle has a 22" barrel, for velocity calculations. We're starting with 100 & 110gr bullets, but if the 110gr AccuBond doesn't shoot well, I'm thinking the SST may be a good fall back. I need to do recoil calculations on it, but the 130gr Nosler BT may be as good a choice. Thanks in advance!

 

[FOTIS]

Cartridge : .270 WSM
Bullet : .277, 130, Nosler BalTip 27130
Useable Case Capaci: 72.818 grain H2O = 4.728 cm³
Cartridge O.A.L. L6: 2.860 inch = 72.64 mm
Barrel Length : 24.0 inch = 609.6 mm
Powder : Hodgdon H4895

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 59 39.60 2422 1693 28217 8721 96.3 1.596
-09.0 60 40.04 2444 1725 28894 8823 96.7 1.582
-08.0 60 40.48 2467 1757 29585 8923 97.0 1.568
-07.0 61 40.92 2490 1789 30289 9022 97.3 1.554
-06.0 62 41.36 2512 1822 31007 9118 97.5 1.541
-05.0 62 41.80 2534 1854 31739 9213 97.8 1.527
-04.0 63 42.24 2557 1887 32484 9306 98.1 1.514
-03.0 64 42.68 2579 1920 33244 9398 98.3 1.501
-02.0 64 43.12 2601 1953 34018 9487 98.5 1.488
-01.0 65 43.56 2623 1986 34806 9574 98.7 1.475
+00.0 66 44.00 2645 2020 35609 9659 98.9 1.463
+01.0 66 44.44 2667 2053 36428 9742 99.1 1.450
+02.0 67 44.88 2689 2087 37261 9824 99.2 1.433
+03.0 68 45.32 2710 2120 38110 9902 99.4 1.418
+04.0 68 45.76 2732 2154 38975 9979 99.5 1.403
+05.0 69 46.20 2753 2188 39856 10053 99.6 1.388

Results caused by ± 5% powder lot-to-lot burning rate variation using nominal charge
Data for burning rate increased by 5% relative to nominal value:
+Ba 66 44.00 2705 2111 38362 9619 99.9 1.414
Data for burning rate decreased by 5% relative to nominal value:
-Ba 66 44.00 2576 1916 32859 9590 97.0 1.507

 

[SJB358]

Good luck Dub, that is a cool project. Might try the same for my wife with my 7WSM, just to get her worked up to full power loads in the future. Besides, I need something to keep me busy.