I have a nice old 950b .25. It is no good condition and fires pretty good..but, occasionally it stovepipes. I looked at a few videos of this gun being used and see where the round (or an empty casing) flys out of the battery when you flip it open. Mine does not. After/if you load it with a round, the round will not come back out on it's own..takes a little down the barrel pressure to remove it…any ideas..?