AllenJ, I have not tried factory ammo. I'll pick up a box and see what I get.
MrAwesome, I will try all the other suggestions before I consider sending the Chrony in for a checkup, just to be sure.
Mal H, I'll extend out the chrony to 20 feet as you suggest. Good idea on the 22, I have one I'll use to see if I get more consistant results.
Wyoredman, I will try some full length resized loads and see what happens.
Everyone, thanks for the abundance of great ideas, I very much appreciate it.
Guns don't kill people, fathers with pretty daughters do.
Two wrongs don't make a right, but three comes pretty close.
Proud NRA member