Lemme guess ..... your carbine has been "tuned", right?
First time I handed a "tuned" rifle, I asked the owner if it actually popped primers. You could actually watch the hammer fall as if in slow motion, it was that slow. Creeped me out.
A friend "tuned" one of my rifles for me and before I even shot it, I had him put it back to stock. There is no doubt that it will pop primers.