Quote from: BDeal on January 27, 2016, 01:53:11 PM
Clark-
It is a very tight pattern with the #5's and yes it moves a few inches up and down and side to side from shot to shot. I guess only a couple inches isn't too bad if the pattern was bigger but it is so tight at this range that it could be a miss. It almost looks like a slug hole at the center at 20 yards.
I suspect that the resin is not fracturing upon upset and that's what is causing the inconsistency in the POI. As you know, the "slug" is supposed to fracture and the resin become buffer as the shot travels down the bore. If that does not happen, or if it does not fracture completely, you may have clumps of shot/resin that enter the choke and exit the muzzle. That can cause the POI to wander as you've described.
Normally, the larger shot like the #4 and #5 are less prone to this than the #6 shot. I found that the 3" shells with 1 7/8 oz of shot are less prone to that than the 3" 1 3/4 oz shells, regardless of shot size.
Are you seeing any clumps of shot? That's a pretty good indication of the problem.
I have shot the 3.5" shells in all sizes/versions but frankly not enough to see if that holds true for them.
I'd recommend that you find some of the 3" shells with 1 7/8 oz of shot and see how they pattern for you.
I don't think it's a choke problem.
Please let me know if I may be of any help and I''ll do my best to be of assistance.
Thanks,
Clark