One post you say the barrel is shot out at 500 rounds and in the last you say it is only half gone in 500 rounds.
Which is it?
I my self think he has noting to worry about till the accuracy starts to fall off. I think he can expect a long barrel life since he doesn't normally run a clip worth of ammo thru it in five trigger squeezes as fast as he can. Is also on the cold side when we are hunting coyotes so once fired it cools off rather quick.
Al