I have had a fair number 22s and shotguns, but my centerfire rifle experience is limited pretty much to .303 and 6.5x55mm. So, my question is, math tables aside, how much real world difference are these magnum cartriges making compared to the older stuff like .308 and 30-06? Are 7mm Rem mag and 300 Win mag etc. really buying noticeibly more range and/or stopping power?