I have a Rem 700C in 8x57 (2004 vintage) 24 inch barrel as well as a 1951milsurp Yugo M48. The Yugo has never been in the hunting fields. I also have a Remington 788 in 30-30 with a 22 inch barrel given to me by an old time hunter friend who had unfortunately past on some years back. I enjoy shooting both calibers and both have taken their fair share of whitetails over the last few years. All within 125 yards or so. I hunt the North Central woods of Pennsylvania. Tioga County to be more specific. I have seen how Remington 170 grain coreloks kill in each caliber. I will say that the 8mm hits a noticeable amount harder than the 30-30. The 8mm seems to put them down fast. Several have been DRT. That said, I dont think there are any flies on the 30-30 out to 100 yards or so. I don't know if 2 inches of barrel length could account for difference I see in the field. I have never lost a deer shot with either caliber but the 30-30 has definitely required more blood trail tracking even when shot placement was relatively similar to the 8mm. When I check out the American ammo paper ballistics it would seem that the 8mm mauser has a modest power advantage over the 30-30 in 170 grain loadings. Around 160fps (276fpe) plus about a 10% frontal surface area advantage. Is this not enough difference to make a difference? What I see in the field shows otherwise. Underpowered for the caliber, yes. Range constrained, yes. A 30-30 in disguise? I don't think so. All comments welcome!!