Funny everyone is ready to trash the gun but I don't see much mention of the ammo used other than w-w. If they are universals I would probably try a few different brands of ammo now that you have cleaned your gun. Especially before sending the gun back or spending a bunch of $ on it. Some of the promotional shells are not the best .
This is the answer to "rough chambers". the chit they pass for ammo these days is really bad as far as the "brass" or what ever pot metal they use for the base compared to the good the good stuff. I see cheap ammo sticking in all kinds of guns. Its not always the gun. Try some good ammo before you go crazy fixing something thats not broke
