Originally Posted by Nimrodmar10
On the Nosler brass the Federal 215M primers were very hard to seat into the primer pockets. I damaged two primers trying to get them into the pocket then ended up flaring the primer pocket just a tad with the deburring tool to get it to finally seat. Has anyone else had problems with Nosler brass having extra tight primer pockets? I could also be the primers. A primer pocket uniformer fit into the pocket with no problem.
I have three boxes of Nosler Brass for the 300 RUM, all with the same lot number. I use CCI-250's but didn't have any issues with seating the primers.
Since your uniformer fit with no problem I would assume your primers are slightly out of spec, I've heard of this before.
A quick check with your micrometer will answer that question. Use a different lot number of primers to compare. Even a .001 difference would cause a hard seating experience.
Save the larger diameter primers, (if they check out that way) for use later if your primer pockets get loose. Better to have them on hand than to ream out your virgin brass.