[Unclenick]

The first question I would have is if the cases on the cartridges causing the problem all have the same headstamp? Some brass is thicker than others, and I've had that cause a chambering problem with 45 Auto one time. If so, I would just toss that headstamp.

If they are not the same headstamp or if they are, but a lot of other cases with that same headstamp fit OK, just take a small file and file a little notch in the rims of all the offending cases and toss them before reloading them again.

For anyone having trouble with cases springing back to shape due to work hardening, I've found Dillon dies are a little tighter than average and will often resize cases my standard dies did not. I don't own any Hornady dies for pistol cartridges, so I can't say how they compare.