Just for fun, here is one test from Richard Mann's websight of a test he did in wet newspaper. I'm not saying it proves anything, but notice how little difference there is in penetration between the .308 Win at a much higher speed than the 30-30.
LOAD
PENETRATION
EXPANSION
.264 Win. Mag. 130 gr. Swift Scirocco II, 1810 fps
22.00 +
0.37
.308 Win. 165 gr. Trophy Bonded Bear Claw, 2700 fps
14.25
0.65
.30 Rem. AR, Barnes 110 gr. TAC-X, 2880 fps
14
0.55
.243 Winchester, Barnes 85 gr. Tipped Triple Shock, 2900 fps
11
0.47
.30-30 Win., 170 gr. Nosler Partition, 2165 fps
10.25
0.63
I am trying to find some data using the same bullet at different speeds, which will be more useful.
