I seem to have issues fully seating CCI Large pistol primers in .45 ACP loads on a Dillon XL 650. They’re flush but just. No issues firing them.

Maybe I’m used to the ease on the Dillon RL 1100 that primes on the downstroke.

I don’t recall seating depth issues in 9 or 40 on the 650 using Winchester or Ginex primers.

I've been reloading on a Dillon 550B for 20+ years. I prefer CCI primers over all else. In loading .45ACP, I've noticed a trend in the last 5 or so years of using small pistol primers instead of large. Blazer brass is usually the culprit. Now, I sort my .45 brass according to primer size; that way, I don't get messed up with the progressive. Perhaps that's what's happening to you.....

Also, some manufacturers will put a "crimp" in the primer pocket. I usually clean the pockets on my cases after sizing/depriming before I continue. It defeats the purpose of having a progressive press somewhat, but I can still crank out 250->300 rounds per hour!

I also hand-prime the cases......

I had some primers not long ago that were near impossible to seat, new brass. I think they were CCI, small pistol, in the 32 H&R mag, or 327 Federal. I tried the Winchester primers I had, they slid right in.

I would never of thought that properly ‘spec’ed’, USA made primers would vary enough to matter. I don’t remember if I figured it out, or someone mentioned it.

Regardless, I’m a believer in trying other types if called for. My brass was new, didn’t spend much time uniforming the primer pocket.

I’m pretty sure it was CCI that was tight. I never did try to measure variances.

Thanks.

All sorted large primer brass and no crimped pockets. Decapper separately and then tumbled in corn cob. No debris in the pocket.

No discernible debris, but I tumbled for a fair bit of extra time and that helped.

Also, cleaned and tightened up the press where I could.

Still more effort than I prefer but much better.

Probably mostly spoiled by the RL1100 that primes on the down stroke so leverage is greater so less effort required.

I always clean my primer pockets after cleaning, and use a RCBS hand primer squeeze primer tool. Slow, yes, but works for me and I use CCI primers a lot.