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mulespurs · December 4, 2016, 11:30 PM

My first guess is that your shell plate may not be snugged up enough.
I tighten the center bolt, remembering to loosen the set screw on the side first, just snug up gently until it will not turn with finger pressure,then back off center bolt 1/8 turn or more as necessary to give positive rotation with positive index clicks.
If that doesn't work call Dillon,I've never heard that they wouldn't help.

December 4, 2016, 11:30 PM	#2
mulespurs Senior Member Join Date: February 26, 2012 Posts: 115	Dillon 550 primer seating My first guess is that your shell plate may not be snugged up enough. I tighten the center bolt, remembering to loosen the set screw on the side first, just snug up gently until it will not turn with finger pressure,then back off center bolt 1/8 turn or more as necessary to give positive rotation with positive index clicks. If that doesn't work call Dillon,I've never heard that they wouldn't help.