New to neck turning.... Lapua 6.5 creedmor brass was new when turned to .0135 turned slightly into shoulder. Once fired, now have brass build up at shoulder case neck junction. Anyone have any ideas why this is happening?? Any help would be greatly appreciated. Fired from a GAP 6.5 creedmoor if that is of any help.
trimmed to 1.910, Berger 140 hybrid, h4350 at 42.0 grains. no pressure signs at primer.
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trimmed to 1.910, Berger 140 hybrid, h4350 at 42.0 grains. no pressure signs at primer.
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