Military 223 brass newb - reaming primer pockets
- Thread starter TRaTSeRiF
- Start date
That first case has a hugely over relieved primer pocket! Those pockets can pop a primer even at low pressures! Thats the reason I reccommended to work off smaal bits untill your primers fit. After 4-5 cases, you will aquire the feel of just how much material to ream out.
NOTE: Some Federal cases have a thin web area where the flash hole is, and the primer pockets can become over sized on the first firing.
I made the mistake of cleaning and prepping these type cases only to find out I had a 50% failure rate due to loose primer pockets. To check them I use a Lee decapping rod from a Lee loader or a Lee case trimmer a seated spent fired primer and put the pin inside the flash hole and push with my thumb. If the primer moves the case goes in the trash.
Below testing primer pockets with a spent fired primer using just finger pressure. NOTE, it is more critical when testing your cases used in a AR15 because gas pressure can push the primer completely out of the primer pocket and jam the rifle. On a bolt action the primer will contact the bolt face and NOT move any further. (applies to any gas operated rifle and loose primer pockets)
Best of luck to you. I bought one 2 days ago, and found it didn't remove the crimp well enough to
allow proper primer seating.
allow proper primer seating.
Here's what I got from Lyman's support:
Not bad.. Mounted on a drill press, it'll make quick work of those cases
I'll give it a shot and report.. Just got some other stuff on the plate to clear first
