Yes, but don't lose any sleep over it.
Few people besides the silhouette shooters (who pour endless rounds of HOT jacketed loads through) ever wear out a handgun barrel, and the rest of the gun is usually worn out anyway.
Rifle barrels are a different story due to more powder and higher pressure, but I have seen old military rifles with no rifling left for several inches in front of the chamber still shoot 3 or 4 inch groups at 100 yards.