either way draw blood and the deer will die, speed only matters to some people not this one penetration/ momentum matters like troy on the swamp people say choot um, choot um.is fine with me.my muzzle loader is not as fast as my 243 but it hits the deer like a mach truck. so speed does not matter i like shooting heavy arrows they make the bow quitter think of momentum if you have heavy sharp mass hitting your target it will hurt something, can kill it.the lack of speed does not bother me i have killed many deer with a 45 pound re curve using the Bear 145 grain heads on fiber glass shafts