A re-crown is a quick and cheap process. Maybe $50 to have it done.

You can check it yourself by visually inspecting it. Looking for burrs, gouges, nicks, etc. You can also paint the end of your barrel with whiteout and then fire a shot. You should be able to see where gas came out and it should look pretty uniform around the edge of the barrel. If it's noticeably off you could have crown damage.

-Jake