This is not based on experience just physics. A 30-30 is a 308 Win is a 30-06 is 300 Win Mag it is simple a matter of distance. X bullet traveling at Y velocity at Z distance doesn't care how it got to the elk, nor does the elk. Velocity at impact along with the bullet's construction characteristics are what matters.
Hammer bullets have a minimum impact velocity of 1800 fps and assuming a 2100 fps muzzle velocity your max range is about ~ 100 yards. Hornady does not list a minimum impact velocity but it could be less given the FTX tip and the Hornady has a slightly better BC so you might have a little more range. Based on your post though, 100 yards may be plenty.
