My question is what makes a particular cartridge a barrel eater. I see that some of the 6.5's seem to have this problem. But in comparison a 7mm Mag has more velocity than the 6.5-284 or even the 264 Win Mag, but not much is said about it. Does it depend more on the shoulder angle, the amount of powder or is it strictly a velocity thing. It seems that if a person was too take care of the rifle, it should last them a long time before having problems. Also for a person that does not shoot a thousand rounds a year, more like several hundred, should'nt say a 264 last basically a lifetime of hunting. Thanks in advance for the response.