Just started shooting home rolled 10mm ammo through my G20. I manually chamber test my reloads in a factory barrel to ensure they are resized well. The reloads function well in the factory barrel, but fail to chamber in the aftermarket Storm Lake 6 inch barrel. They "snag" about halfway in, will not seat manually, and will not seat if chambered from the mag. The Speer manual calls for a case diameter of .423 at the neck and .425 towards the rear, I checked some of the rounds here and at the mouth theyre around .422 - .423 so they look ok and fully chamber in the factory barrel. I full length resize with RCBS carbide die, so they should fall into specs . I just checked some Kinematics Research rounds and they are a bit smaller - .420 at the mouth and at the rear. Other factory ammo chambers just fine in the Storm Lake barrel. Are the chambers on these Storm Lake's really so tight that they are beyond reloading specs? Do other manufacturer's dies resize the brass to a tighter diamter? Anyone else had this problem with aftermarket barrels? I bought this barrel so I could shoot reloads with lead.