Could a dirty bolt mechanism cause missfires on a CZ 452 .22wmr? I took mine out to check the zero tnite after putting a boresnake through and had 5 missfires out of about 20 shots!! I know it could be a dodgy batch of ammo too but I'm not sure how much of a dent the firing pin should make in the rim of the round, as I've never had a problem before and took any notice?
Any ideas chaps before I go back to the shop with the ammo, in case it's the bolt?
Stratts (The new Roy Lupton!!)