Update........

Well, I started with trimming all of my cases, while I was trimming, I noted that most of the brass had a 'flat' spot at the mouth. Not a true flat spot, more of an out of round area that looked flattened toward the center.

I'm not sure what, if anything, is the significance of this tid-bit, but I figure that I would throw it out there to see who might know.

I have not fired my 52 yet as I am still in the process of doing what was suggested here, starting with the trimming.

Next job, load up some with less crimp and then test fire.

I will report findings when that happens.