Ongoing 1100 odyssey. Root cause analysis on the last 50 stoppages showed 44 (88%) of them were related to the resize/decap station. Mostly sucked-back primers. The balance were mostly weird things like the base of the primer punching out, but leaving behind a "sleeve" of primer in the primer pocket.
The Dillon sizing die got much better with some decapping pin adjustments, but I screwed up three before concluding that I couldn't figure out the secret to consistently making one that avoided suckbacks.
Briefly used a Lee that was perfect in 500 rounds for not sucking back primers, but they've changed the design recently, and it doesn't size as low on the case as the Dillon dies.
I feel a little ridiculous, but I bought a Mighty Armory 9mm sizing die and decapping set for $130.
It has significantly improved my rate of production. No primer suckbacks at all, and the sizing force is much decreased. So too is the sizing action, and I'm a little concerned about setback, but we will see.
I also have installed a Mr. Bulletfeeder. Once I perfect the adjustments, I expect it to be amazing. For now, the forecast calls for extra-heavy rain.