Thread: Correct Size Black Powder Cap for this Derringer?
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Old 08-04-2018, 02:57 PM
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Originally Posted by crstrode View Post
Cqps are not all alike. I've used #10 caps on those guns - as long as it fits on the nipple and goes down all the way it will be fine. A larger cap can be pinched a bit to keep it from falling off. Since we cannot see the top of the nipple, I would not be surprised to find the nipple has been peened-over by dry firing. The top of the nipple should be flat and even, not mashed over with only a smallish hole left for the fire to get through.

Dry firing is the bane of percussion cap guns. NEVER do it.
The #10 basically didn't seat all the way down.

Maybe I'll order some #11's. I cleaned this out before attempting to fire it. I really just want to shoot it once to see it work.
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