Thanks for all the responses so far.
I forgot to include that I had tried seating the bullets much shorter, down to 2.19" and had the same problems; however I had one that was 2.22 that chambered perfectly.
I don't see any obvious marks on the case/bullet where it is sticking, other than a few faint "scuff" marks below shoulder.
I'm also curious about the loads I already have. Are they safe to shoot even if inconvenient? What about the ones that chamber fine after being chambered a couple times? Or do I need to unload them all, as I fear?
Thanks for all the advice so far and please keep it coming. I won't have a chance to do more loads until tomorrow evening. When I do I will try each suggestion until it works.