I'm not a real competition shooter, but have a question or two about barrel wear that I'm sure you competition shooters can answer.

When you have to set back your barrels, how far is that, are we talking .200 up to maybe .400 ?

Also, after you have set back you barrel maybe once or twice, does the barrel itself get worn out because of friction ? I know that eventually it will loose its rifling and start to fade, but with one or two set backs are you still OK ? I'm talking about cartriges in the PPC to 6.5x47 class, I realize that an over bore cartridge will greatly speed up your need to set back or possibly get a new barrel.

Also, there has been theories on ball powder vs stick powder on barrel wear, in your experience have you guys found one over the other gives better barrel life ?

Thanks guys.

wll