To calculate how far a deer will run when shot with a certain cartridge, subtract the normal powder charge from 100. The remainder is the distance a deer will run when shot with that cartridge. The 30/30 for example for example uses about 35 grains of powder, so a deer will run 65 yards. Some 338/378 Weatherby loads use 118 grains of powder, so they will actually knock a deer backwards 18 yards.
I know there were a couple studies done in Europe showing little difference in how far moose ran after being shot with cartridges from the 6.5X55 up to the 375 H&H but my own experience on three deer, one elk and a goat (he looked just like a bear, swear to gawd), I think my formula is more relevant.
Last edited by Royce; 12/31/14.
