When I first got my handgun permit, I bought a used (yet beautifully pristine) Dan Wesson in 357, with an 8-inch barrel.
Once loaded, it locked up about every fourth round -- AND, despite polishing the cylinder, the full length .357 mag shells ALWAYS stuck, requiring a dowel and a crapload of effort to pound them out.
Very accurate gun, but I never shot more than a few dozen rounds through it.
I realized, when I traded it, that it still looked like it was in pristine condition. BECAUSE YOU CAN'T SHOOT IT.