So I’ve been into 300bo for a while as a back burner project. With a suppressor on its a hoot to shoot. But I’m having a problem, it seems the necks on some of my loaded ammunition is coming out to wide making the gun into a jam-o-matic pain in the rump. I’m using good projectiles, mostly sierra j-words. I guess I don’t know what direction to go. Some combination of bullets and brass run great. Some don’t. Not sure if I should try different dies….thickness trim the necks….I’m kinda stuck.
All 300 factory brass, I haven’t been using converted brass to try to eliminate that as a variable.