Just finished priming some FC .308 and FC and PMC 7mm Mag. This was all once fired brass and I using WLR primers in the .308's and WLRM in the 7mm Magnum brass. Out of 50 pieces of .308 I found 5 that appeared to have loose pockets. Out of 50 pieces of 7mm magnum I found 1 PMC and 5 FC that had what appeared to be very loose pockets. I'm just not sure how to tell if they are too loose to use. Is there a way to check the primer to see if it is too loose? They aren't so loose that they fall out if you tap the cartridge on the table but they just felt like they went in awful easy compared to the others. Is this a common problem with once fired FC brass? Thanks for your help!