Let your buddies think they barrel wears out at whatever number that trips their boat. They probably tend to blame their bad shooting on the gun being worn out.
Just agree with them and after a while tell them that you will buy it. You know it doesn't shoot worth a damn anymore but you just want a beater gun anyway.
Offer them what a gun that won't shoot any good is worth.
Next time you go shooting with them you can out shoot them with their "worn out" gun.
Lol shooters are always blaming something I was at the range and some guy with a $1400 ACOG was blaming his group on it.