03-06-2021, 09:08 PM
I have crimped using Lee factory crimp dies. I like to crimp a little because I am using powder coated bullets and the sizing is not perfect. I have been reloading Hornady new and once fired cases. The crimp has slightly bulged the neck behind the crimp and caused feed jams, failure for bolt to close, and failure to fire. I have two 20" gas guns, Faxon and CMMG barrels.