I'm making heavy 9mm from LYman 356637 mold. Coating with HITec coating , then sizing to .356 and coating again.
Loading on SDB I have about 10% of the loaded rounds that don't fit into Wilson gauge
I never had this problem with Lee 124 g mold.
The ones that don't fit the gauge , I can see a bulge in the middle of the case.
So I've been putting this aside and taking them apart later.
Other day , I've removed pin from sizing die and tried to resize the loaded rounds that didn't fit . Behold , they fit now ( of course ).
Would that cause a problem? These rounds will be for plinking only. Ones that are good from the start are the ones I'll use at local competitions.