RE: 7mm-08 or 308 for big game
With both cartridges loaded to 2,800fps and the bullets being the same make and style, the 7mm-08 pass's a .308 at right around 200 yards in both muzzle vel and energy.
7mm-08 140gr 200 yards fps.- 2,440 fpe1851, 300 yards fps271 fpe1603, 400 yards fps2109fpe1382
.308 150gr 200 yards fps2360 fpe1854, 300 yards 2156 fpe1547, 400 yards fps 1961 fpe 1281
If you use a 150 gr bullet in the 7mm-08 the difference is even more so, to the tune of 300 more fpe at 400 yards.
fpsfeet per second, fpe foot pounds of energy.