Quote Originally Posted by jrsdws View Post
Found some 150gr American Whitetail laying around and went back out and it was significantly better with 3 shot groups strung horizontally about 3" or so and pretty decent vertically.

I did start with a clean bore and never cleaned it throughout the sessions. I also was not really patient letting the barrel cool between shots. It didn't seem to effect the 150gr much and it was hard to tell on the 165gr as they were pretty bad.
I had a 99 stringing shots horizontally also. I removed the forearm and shot it with receiver resting on sand bags (don't rest the gun on the barrel) and it shot without stringing the shots. Then I put a rubber washer on the barrel stud and put the forearm back on, problem solved. Hope this helps .