I set up my seating dies using a factory or previously loaded round ....place round in press,lift to top of stroke and slowly screw stem in until the handle gives a wee twitch...the die body itself does bugger all in the seating process unless you have it screwed down far enough to crimp AFTER the projectile is right down...so try it with die body up higher,maybe two full turns?? from where it is now,then set stem as above and try it.
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