if you dont care about matching parts for collector reasons then the only things are be sure its above 800,000 for springfield armory and above 300,000 for rock island all others are safe. then its just a matter of muzzle and throat wear. a lot of 03s are counterbored. its usually ok but there isnt much real way to tell wear after its been bored out. a counterbored barrel is missing the rifling for the last half inch of bore near the muzzle.
a muzzle gauge in 30cal is a good indicator if its less than 4 you still got a lot of life left in the bore.
a poor mans or field expedient gauge is taking a round of ammo for the rifle in question and dropping it in the muzzle. if the bullet goes in up to the case mouth its got excessive wear or has been counter bored altho most of the time the shoulder of the cartridge will ht the crown in counter bores
spare barrels are common on gunbroker so if you find a good one in everything cept excessive erosion they can be rebarreled fairly cheaply.
"Gun control: The theory that a woman found dead in an alley, raped and strangled with her panty hose, is somehow morally superior to a woman explaining to police how her attacker got that fatal bullet wound." — L. Neil Smith
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"I crapped my pants to avoid the draft!!" -Ted Nugent
Last edited by JonM; 10-17-2011 at 02:40 AM.