my .223 zastava wouldnt fire norinco ammo early on....I was shown to release bolt spring when storing (added bonus it wont go back into rifle ) and have never had issues with it again. had a couple of shotguns that were picky with primers either cup hardness or seating depth were causes. with the norinco rifle its simple matter to twist both halves of bolt in opposite directions.... my other rifles there is wee catch,getting them back is simply twist in other direction.
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