Lol, I will have to go ahead and disagree with that, snuffy. Hundreds of thousands of rounds in, chamfering pistol and revolver brass is something that I absolutely do not and will not do.
I was going to go into more detail with that post, but then came a knock on the door!
GET OUT THERE ,,-- GET THAT LAWN MOWED OR WE'LL DO IT FOR YOU! I told her to KMA, I'll do it when I feel like it!!
SOMETIMES in some cases I will chamfer the inside of revolver cases and in one semi-auto. After trimming! OH MY
gosh another hearsay, trimming revolver brass!
Back in my sillywet days ,(Ya know IMSHA?), super accuracy was demanded from every load. Cases were trimmed, inside and outside chamfered and polished. I was pushing maximum loads, the cases
would stretch, needed rimming.
That one semi-auto case is the 357 sig. It's super short neck doesn't react well to belling. It needs all the case neck tension you can give it. Belling it means you then give up some of the case neck tension, yeah I know crimping will eliminate the bell , but chamfering eliminates the necessity of the bell to get the bullet to seat without scraping the crap outa the driving surface.
I suspect the OP should stop, read-up on reloading how-to then maybe adjust the belling die again.