I bought a 550 about 2 months ago and set it up for 45 acp. The only problem I am having is with the priming system. On the downstroke, the primer bar does not always come back far enough to pick up a primer from the magazine before coming forward on the up stroke. I can force it to work 100% of the time by nudging it the last 1/8th of an inch or so with my left hand. The problem seems to be that it just "hangs up" a little before it comes all the way to the rear. Is this common during a break-in phase? Should I lube it with some graphite powder? I have not yet called Dillon, as this is more of an annoyance at the present time. Thanks.