When you load the mags, lightly tap the primer side og the mag aginst your hand. This will "set" the rounds properly in the mags and all rounds will fire.
(Old M-16 trick)

(Old M-16 trick)
What ammo mfg are you using? Sometimes one brand can give you problems with light primer strikes.OK, I'm new here, searched the forums a little bit.
At least once every 2 magazines I fire, there is always 1 that does not fire. I look at bottom of the casing and there is a dimple, but it did not fire.
Is there an adjustment that will make the pin hit harder?
Thanks
If the dents look good, my guess is bad ammo. Compare it to the dents in the primers that fired. Do they look the same?New hornady amo . I get a dud every 5 or 10 shots .
I can take the dud and try it 3 times and get 3 dents and no fire. try a fresh one and bang.
I think primer material is not infused corectly . if you know what I mean.
Ditto, just manually pull the hammer back and give it a second shot at the primer. Could just be a box of hard primers.Evilscooby Have you tried reshooting the same round a few times to see if it would fire?