I installed a lube die, followed by a full-length resizing die. After measuring the resized cases with the RCBS "Precision Mic", it appears the shoulder is moving in the wrong direction, or about +4 on the mic.
Could the expander on the resizing die be pulling the case neck up enough to have this effect on the case shoulder position? I feel the expander dragging on the case mouth as it exits the case much tighter than it did in the past.
Prior to trying this RCBS lube die, I used to spray the brass with a huge amount of One-Shot aerosol lube. No doubt it got into some of the case mouths, keeping the expander lubed and I never got such an unexpected result after resizing.
Am I on the right track? If I have to start lubing case mouths, that would negate the convenience of the lube die.
Could the expander on the resizing die be pulling the case neck up enough to have this effect on the case shoulder position? I feel the expander dragging on the case mouth as it exits the case much tighter than it did in the past.
Prior to trying this RCBS lube die, I used to spray the brass with a huge amount of One-Shot aerosol lube. No doubt it got into some of the case mouths, keeping the expander lubed and I never got such an unexpected result after resizing.
Am I on the right track? If I have to start lubing case mouths, that would negate the convenience of the lube die.