You're an astute observer MO Archer. Target 16 is below. It's not as extreme as the other two, but the stringing problem is still apparent. I was shooting with my glasses on, and got to wondering if something having to do with how I was seeing the scope reticule through the glasses was causing the problem. So I shot #16 without the glasses.

You might be right Sproket. It's pretty clear it's not the load because I had the same results with a completely different load in the range session two weeks ago. When 105 grains of T7 under a 300 grain bullet and 95 grains of GOEX under a 250 grain bullet produce the same stringing results, you have to figure it's not the load. Actually, I would be happy to find it's a scope/mount problem.

UC / Lee, I shimmed it with duct tape right in front of the wedge pin. Didn't think to try a shim near the hook. The first thing I checked was the tang, because I've seen loose tang screws cause grouping problems on a buddy's gun. But the tang was good and tight and barrel fit at the breech is about a tight as it could be.

It sure does seem to be a mechanical problem. I guess I'll have to try shimming different spots on the barrel. The only other thing I can think of is to go with Sproket's theory and pull the scope and bases and re-mount them (man, I hate doing that), or try the iron sights, or mount a different scope.