After posting those targets at 100 and 125 yards, I got to thinking that I had probably shot a 150 yard target also. I just checked and, sure enough, I did. Here it is.
Now for me, a three inch group at 150 yards with a sidelock and 4X scope is doing pretty well. The center of the group is four inches below point of aim, which jives pretty well with that trajectory chart. As you know
Cayugad, the heavy crosshairs on that shotgun scope cover about an inch and a half width on the target at that range. So sighting on a paper target at long range is less precise than with higher magnification and finer cross hairs.
I suspect the shift of the group two inches to the right has to do with the fact that on the Renegade the scope is offset about a quarter-inch to the left of the center line of the barrel (although it could well have been my sighting error). Does anyone have any experience or an opinion on that?