First the warning..... Do not use a body die on loaded ammo....... that said and that by the way is what the instructions say, I use a body die on loaded rounds that i have over crimped and slightly bulged the case and never had a problem. As said already the neck doesn't touch so unless you have a pin that hits the primer when you lower the case you should have no problem. Just remember to lube the case cause you really don't want to stick a loaded case.