RE: 7 mm mag. throat erosion?
If you can shoot the barrel out of a 7mm rem mag then you've done some pretty good work and should reward yourself with a new barrel. The new barrel will be a heck of a lot cheaper than the money spent on all the ammo it took to burn out the first barrel. However, if I had a 270 and a 30-06 I don't think I'd be buying a 7mm rem mag, what one of them will do either of the others will as well. I'd probably step up in size to a .375 H&H or down in size to a neat little .257 roberts.