Bayou Boy, I discovered years ago that as you shoot from a full magazine with lead-tipped bullets, the battering is progressively more with each round shot.
The thing is, it affects accuracy or group size very, very little.
I've done comparisons with single loading the cartridges, and it just doesn't really make any difference. Aw, maybe from 3/4" at 100 yards up to 7/8", but that's not enough to worry about. Just as easily could have been my shooting and not the bullet deformation...
Flattening of the nose is likely to affect the trajectory out beyond 300 or 400 yards, I'd guess, which would lead to vertical stringing--but that's beyond normal hunting distance.
My usual handload for the .270 was with the Remington 130-grain Bronze Point. I used surplus 4831 powder, just pouring until the case filled and then compressing the load. From the literature, that was around 45,000 psi or so; less than max. Quite accurate. Reasonable exit wounds on cross-body shots on Bambi.
, Art