I had loaded 20 rounds and fired when I notice the primer was backing out of the primer pocket, I looked a little closer and discovered several cases had split neck/shoulder (3 out of 20 cases). I checked another 40-50 once fired cases and found several with the same defect. I can't recall when I purchased them on Gunbroker only that they were purchased prior to buying a new 336 Marlin. I think I will (try) to anneal twenty cases, if that doesn't work I have several boxes of factory ammo. William
Last edited by William T. Watts; April 30, 2012 at 02:15 PM.