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Primer seating

Is there anyway to adjust the primer seating depth?  I suspect not but thought I'd ask.  Only about one in 20 seats tight, the rest seat at varying depths.  I have owned a 650XL for ten years so I know how to be consistent in rhythm and seating stroke pressure.  This is a new machine that I have loaded 500 rounds with.  It did this from the beginning and hasn't changed.

See page 11 of the manual. There is a expanded view of the primer seating assembly.  Maybe the primer seater assembly has backed out.  Much like changing the 650 from small to large primer you have to make sure to tighten it up.

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