[TheSILENTtype]

in need of a few outside opinions.

I have had a question running through my mind whenever I pickup one of my private firearms, and I always seem to forget it before I am near a Smith.

I have bought 8 snapcaps in packs of 2's from 4 different companies.

When I put them in the following firearms I get the equivalent result :

1
Mossberg 500
I am able to cycle the first snapcap and get jammed yet liveloads fly through without problem.

2
Norinco Magfed 982H
I am able to cycle both snapcaps and liveloads through without problem.

3
870 Magpul
I am able to cycle a few snapcaps through and endup with 2 wanting to go in at once. normal load without problem.

I have swapped and mix matched the caps in every combo possible, yet always recieve a very similar result.

Any thoughts on this?! I was leaning to some sort of factory damaged or 'dud' caps, but once i started mix matching them I was at a loss.