The 7-08 and 7 m are basicly the same as far as ballistics are concerned. The 7-08 does have about 14k more pressure. So in the same gun it would have more felt "recoil" rather it is hard to say if its more push back, more blast or both. Its not something that will ever be tested as no one in thier right mind would ever chamber a 7-08 in a long action and you can't just re barrel a mauser to 7-08. It would be a very intresting test, but not something that is worth the money or the effort to find out. Its not just putting a new barrel on the gun, the bolt has to be changed as well.