Im making ammo and the batch I jsut finished has issues chambering. It feeds up the ramp and into the chamber until the bolt stops about 3/4 inch away from the receiver. As you can see in the picture, I sharpied the cartridge to see where it was rubbing. There is a clear ring around the neck of the cartridge. Im not sure what it means? Is that part of the bullet to fat for the chamber itself? I slugged my barrel to .409 so I beagled my .406 mold to get decent boolits. ANY HELP IS APPRECIATED.