A few months ago I switched from a Lee Classic Turret press to a Dillon 550c. On the Lee I was using RCBS dies with a Lee taper crimp die and a Lee powder thru expander. When I bought the 550 I also got all new Dillon dies.
The only thing I've changed is the press and the dies. The OAL of the cartridges is the same, powder charge is the same, crimp is the same and the boolit I'm using is the same.
So here's the issue: when I load 9mm, about 1 or 2 in every 10 rounds does not want to go fully into battery. Sometimes I can smack the back of the slide to get it in, other times I have to rack the slide and eject the round. Most of the time it's hard enough getting the stuck round out that I have to use the edge of a table.
I've tried multiple pistols, many of which have been throated by DougGuy and I still get this issue. The stuck rounds fit just fine in a case gauge.
At this point I've reset the Dillon dies multiple times, following the instructions exactly and it still happens. I know Dillon makes quality stuff and I have a hard time believing it's the equipment, but at this point I have no other idea. I use the 550 to load 45ACP, 38 spl and 300 blackout using non-Dillon dies and I don't have this issue.
Anybody have any ideas?