Thread: Trouble seating primer into pocket

Take vernier (all handloaders have a vernier don't they) and measure depth of primer pocket. LRP pockets run around 130 thou depending on brass brand. Measure primer thickness. There is quite a variation between brands although in most cases the cups are the same just the anvil protrudes more on some brands.

Check bottom of primer pocket. Some are poorly formed and have a radius rather than sharp cut in the bottoms.
Buy a primer pocket uniformer. They usually cut just under SAAMI at 131 to 132 thou depending upon brand. They will true up all your brass to the same dimension and square up the bottom of the pocket.

Don't buy a swager. You'll be wasting your money on this occassion. They are more suited for restoring brass that has had expanded pockets after several firings at near max load.

New brass can be an arse the first time it is loaded both in seating primers and projectiles. You just need to do a bit of brass prep.

Buy better quality brass.