i was out shooting the other day in -30 weather (yea,i'm desperate) to try and complete my first 100 rounds down the tube and i had a soft strike on ae ammo,just a little ping in the primer,second strike set it off.
months ago i tried some norinco .223 and could not get it to fire at all no matter how many times i pulled the trigger,tried another round and got the same results.loaded mfs ammo and had no issues for 40 rounds.

so my question is why is this happening and is there a way to increase the striking force.
my friends were using tikka t3's and their spent casings looked identical in primer strikes as mine.