Thank you very much for your info. My questions are answered and I guess I'll go about building and testing my own loads. I just wanted to make sure for what components I was able to obtain for .this round I would be able to properly play around with to get a solid firing load built. Like I said I want to go as long as possible to keep the bullet as close to the rifling as possible without feed issues with the magazine or bolt. I just needed a bit of advice on startup...not sure why i didn't call it a cannelure, I knew that :-)
I really wish more components were available... If anything I have the brass, but not enough of the other components, hopefully after the rush they will start to appear again!