They lift right out of mine...but I grinded about a 1/4" of the rim away on each side of the split (where you can easily lift the hull out with your fingernail) I also spring them a little where they fit tighter in the chamber and I keep them clean and lubed...and honestly I really can't tell they are in there.

Only problem I've ever experienced shooting 12 in a 10 was some foreign made shells have soft primers and you'll notice a little soot where the firing pin pierced the soft primer.