I agree totally with your pic for long range[264 Win mag]However,I have been shooting the same custom rifle I built in 1970 with a steady diet of H-570 and 130-140 gr pills with no throat or barrel errosion.A good quality tube and common sense reloads will give you extended barrel life in any magnum caliber.I still don't know why the 264 always gets such a bad rap with all the Weatherby barrel burners out there!!!
