highlander 5
Member
Mods move if in wrong place. I have 2 CZ 527s in 7.62x39 and had an on going problem that seems to be common and I thought that I would share my experience with others.
The most common problem is these rifles will function fine with steel case ammo but not so well with comercial brass case ammo. First I tried replacing the firing pin springs,liked some brass ammo 20-30% would not fire even when struck twice. Tried handloads with a variety of brass cases full length resized still got misfires,tried neck sizing results not much better then full length sizing. Now I should mention I've 40+ years of experience in reloading. At my wits end I was poking around the various sites of reloading equipment and stumbled upon a set of shell holders of different heights from Redding to move the shoulder back that range from .002-.010 in .002 increments. Figured what the heck and order a set,used them as instructed and low and behold they worked. I loaded 20 rounds and all went bang on the first firing,I know this may not be a good sampling but before this I got 5 maybe 6 rounds to fire 2-3 miss fires and the pattern would repeat. I'll loading up a batch of 50 rounds with some cast bullets and see if my luck holds up.
The most common problem is these rifles will function fine with steel case ammo but not so well with comercial brass case ammo. First I tried replacing the firing pin springs,liked some brass ammo 20-30% would not fire even when struck twice. Tried handloads with a variety of brass cases full length resized still got misfires,tried neck sizing results not much better then full length sizing. Now I should mention I've 40+ years of experience in reloading. At my wits end I was poking around the various sites of reloading equipment and stumbled upon a set of shell holders of different heights from Redding to move the shoulder back that range from .002-.010 in .002 increments. Figured what the heck and order a set,used them as instructed and low and behold they worked. I loaded 20 rounds and all went bang on the first firing,I know this may not be a good sampling but before this I got 5 maybe 6 rounds to fire 2-3 miss fires and the pattern would repeat. I'll loading up a batch of 50 rounds with some cast bullets and see if my luck holds up.