First day I had several failures to fire. The slide would close, but not enough to push up the loaded chamber indicator and the gun would not fire. Rack the slide and fire the next round. Put the previous failed round back in and no fire. Is the chamber cut a little short or the case a little long? Too late to measure accurately as my buddy fired them all in his gun. Tore it all apart and did a thorough cleaning ( ya, should have done that in the first place) The situation improved, but I still had one to fail, then fired after reloading it. Short chamber? Just need to shoot it more? Only fired about 100 rounds through it.