I'm a new Contender owner and have a question. I regularly shoot shotshells made from .444 brass in my regular .410 shotgun. They do a great job and I don't have to have a dedicated loader for 410 shotshells. When I try to shoot my .444 shotshells in my 45/410 barrel, they don't always fire. When they don't, the primer is not even scratched, so I know the firing pin didn't hit. When I load .45 Colts in the same barrel, they shoot every time.
So, is the thicker rim of the .444 brass keeping the barrel from closing completely and therefore not pushing in on the thing that the locking lugs press on to let it fire? If I "snap" the barrel closed vigorously, it will sometimes fire, but not if I close it slowly.
Thanks for any advise that you might have. I really like using the .444's, but if I have to switch to real 410's I will.