Yes and no (about empty shell).
On my Lakefield 91T (target rifle), spent cases will simply not fit (tight chamber).
On the Browning Buckmark Countour, I'd say I can fit ~30-40% of the spent cases.
Snap cap worked fine on the Lakefield, but was blow to pieces the first it was used in the Buckmark.
I just don't dry fire the .22; The Glock 22 on the other hand... =D