Quote Originally Posted by 68Charger View Post
since he mentioned 5.45x39 upper, he's dealing with hard primers- with the AK74, the Russians spec hard primers so they don't have to put in firing pin springs.

Why not run a stock (usgi) setup and see what works and what doesn't before you bring variables in to the picture.
FWIW: I have a JP set up in my rig went to a different commercial ammo and experienced light strikes. went back to the stock hammer, keeping the lighter trigger spring and no issues.
Shoot first, spend later.