I've been having quite a few ftfs this year and I have it analyzed to this:
My two main current semi-automatic rifles both do it a lot.
Hardly ever with any of several bolt guns.
Same issue with several different ammo types.
There is a definite mark on the rim, maybe a little fainter than it should be.
Second go usually fires.
I'm guessing maybe the new eco-friendly non-aerosol lube that was the only thing I could find last time I needed some???
I use a lot more lube on the semis than the bolt guns.
My two main current semi-automatic rifles both do it a lot.
Hardly ever with any of several bolt guns.
Same issue with several different ammo types.
There is a definite mark on the rim, maybe a little fainter than it should be.
Second go usually fires.
I'm guessing maybe the new eco-friendly non-aerosol lube that was the only thing I could find last time I needed some???
I use a lot more lube on the semis than the bolt guns.