Thanks for all the info. Sorry I posted a thread and then was unavailable to respond for so long. I own a couple of small businesses that think they own me.
I want to clarify that I am not dead set on finding a powder that would stop bulging my cases in the Shield. I was kind of hoping that a little slower powder coupled with loading it down a fuzz would help reduce or eliminate it, but it is not crucial. I like my shield for summertime carry and always want to train with the piece that I actually carry. That being said, I think the best way to cure the bulge is with any one of my favorite words: Sig, H&K, Walther, etc. I'll get another comparable sized carry gun that does not bulge cases.
A friend of mine who is an long time pistol reloader told me about Universal Clays quite a while ago and I got 16 pounds of it. That is running out now and just thought I would see if you guys thought that there was a powder that was more suited for 9'ers.
BTW, if you haven't already seen it, below is a picture of the bulge I have been referring to. Its kind of deceiving because per the reloading data and my chrony, these loads are not that hot. I guess it just goes to show that a faster powder can produce a quick pressure spike without necessarily getting a ton of velocity to show for it. The design of all of my other guns seem to be able to handle it but not this one.
Thanks again