Could anyone help me out with this calculation or point me in the right direction to do it? I’d like to know the max expansion distances for both the Barnes 50 and 70 TSX rounds, specifically the improved Black Hills 50 TSX load which uses a slightly different projectile.

The BH 50 TSX has an expansion velocity threshold of 2300 FPS.

The Barnes 70 TSX has an expansion velocity threshold of 1800 FPS.

Given this, I’m trying to figure out the maximum distance for expansion with the following barrel lengths:

50 TSX (Black Hills)
11.5”
14.5”
16”

70 TSX
11.5”
14.5”
16”

Any and all help would be greatly appreciated. Trying to find the most optimal barrel length and ammo combo.