378 weatherby velocity ?

[darrindlh]

Guys,
Will i be able to push a 330grn bullet at 2900fps with a 378 Weatherby? All Opinions welcome.

Darrin

 

[proload]

Guys,
Will i be able to push a 330grn bullet at 2900fps with a 378 Weatherby? All Opinions welcome.

Darrin

300gr or 330gr?

Nosler #6 says you'll get just under 2900 with a 300gr projectile as the absolute max with IMR7828. I don't have data for a 330gr load.

This will depend on your rifle though and how tight the chamber is.

 

[340Shooter]

2900 with a 300gr is nothing to sneeze at. I have one, and it is a beast

 

[340Shooter]

QL shows it gets pretty close with 7828...

Cartridge : .378 Weath. Mag.
Bullet : .375, 300, Nosler AccuBond 53662
Useable Case Capaci: 115.859 grain H2O = 7.523 cm³
Cartridge O.A.L. L6: 3.655 inch = 92.84 mm
Barrel Length : 26.0 inch = 660.4 mm
Powder : IMR 7828
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 84 86.80 2376 3762 32105 9590 92.0 1.686
-18.0 86 88.97 2437 3956 34312 9888 93.2 1.642
-16.0 88 91.14 2498 4156 36677 10173 94.4 1.599
-14.0 90 93.31 2559 4361 39208 10443 95.4 1.549
-12.0 92 95.48 2619 4570 41919 10698 96.4 1.501
-10.0 94 97.65 2680 4785 44828 10934 97.2 1.454
-08.0 96 99.82 2741 5003 47949 11153 98.0 1.409
-06.0 98 101.99 2801 5226 51300 11351 98.6 1.365
-04.0 100 104.16 2861 5454 54907 11527 99.1 1.324 ! Near Maximum !
-02.0 102 106.33 2921 5684 58772 11682 99.5 1.283 ! Near Maximum !
+00.0 105 108.50 2981 5919 62967 11812 99.8 1.245 ! Near Maximum !
+02.0 107 110.67 3040 6156 67477 11918 99.9 1.207 !DANGEROUS LOAD-DO NOT USE!
+04.0 109 112.84 3099 6397 72351 11999 100.0 1.171 !DANGEROUS LOAD-DO NOT USE!
+06.0 111 115.01 3157 6640 77625 12065 100.0 1.136 !DANGEROUS LOAD-DO NOT USE!
+08.0 113 117.18 3215 6885 83313 12127 100.0 1.102 !DANGEROUS LOAD-DO NOT USE!
+10.0 115 119.35 3273 7134 89454 12184 100.0 1.070 !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 105 108.50 3105 6424 76534 11308 100.0 1.152 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 105 108.50 2798 5216 50813 11784 95.5 1.366

 

[Lefty7mmstw]

Dang, my 375 h@h with a 300 at 2600 is enough of a bear at 8# scoped. I'd almost hate to be dropping a pill from it going another 300 fps faster.