varminter .223
Well-known member
Reasons an auto loader will blow out a primer?
Excessive head space? How much?
Over pressure?
Lube in chamber causing pressure?
I'm not convinced lack of friction on case walls will cause a blown "out of pocket" primer.
Likewise too smooth of a chamber?
I believe cratering is from firing pin hole slop.
Chronographs right on with published load date figuring 30 fps per inch loss.
This barrel has a reputation for blowing primers and it seem to show up for me after applying a liberal dose of wd40 to the bcg chasing a cycling issue which ended up being the stoner mags. The rear of the follower sticks down no pushing case head up against feed lips. Magpul works flawlessly.
Biggest issue was with some hand loads for my axis that has a shorter head space with shoulder bumped back more.....about .009" shorter that a fired case.
Both of my bca barrels ran this same dogtown lot great. Previous own had issues as well but with a suppressor.
One other thought....excessive gas?
Excessive head space? How much?
Over pressure?
Lube in chamber causing pressure?
I'm not convinced lack of friction on case walls will cause a blown "out of pocket" primer.
Likewise too smooth of a chamber?
I believe cratering is from firing pin hole slop.
Chronographs right on with published load date figuring 30 fps per inch loss.
This barrel has a reputation for blowing primers and it seem to show up for me after applying a liberal dose of wd40 to the bcg chasing a cycling issue which ended up being the stoner mags. The rear of the follower sticks down no pushing case head up against feed lips. Magpul works flawlessly.
Biggest issue was with some hand loads for my axis that has a shorter head space with shoulder bumped back more.....about .009" shorter that a fired case.
Both of my bca barrels ran this same dogtown lot great. Previous own had issues as well but with a suppressor.
One other thought....excessive gas?
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