Originally Posted by
dale clawson
Were the empty brass fired in the rifle you are using them in? If not they may have been fired in a rifle at the long end of specs, or out of spec, on headspace, and the current rifle may be on the short side of specs. Try a resized empty brass to see if it will chamber. What press did you resize in? What dies? FL or neck size dies? Did you screw the resize die down to contact the shell holder firmly? DALE PS the pump rifle may require a small base(SB) die due to less camming power to close on the round. This will work the brass more, and will shorten case life, but may be necessary for dependable function.