Originally Posted by
JGFLHunter
So I went to the range and shot some reloads. I wanted to check expansion of round but instead of expanding most of the bullets actually shrunk? I did crimp them But barely. What the heck is going on, I've never experienced this. The groups were ok.
I did some testing and non crimp bullets from magazine to chamber can add .010 to OAL. With the instructions from the crimp die it added .002 to OAL. I believe that's maximum crimp. How much is actually needed? Is maximum safe?
The best groups were at 28.5 grains of H322 with 110 Pro Hunter
6.8 AR platform
Please explain what you are talking about in what I have bolded in your post. Are you talking about how far the bullets are seated in the neck of the case? You are using the words "expansion" and "shrunk" and I don't believe anyone reading your post has any idea what you're talking about the way you have stated things and why you have had no repsonses.