13" right and 3" high
I did the initial shooting at 25 yards from the Game & Fish covered firing range in good conditions. The sabot shot one big ragged hole. I had a little trouble with the Tasco 3 x 9 and it's adjustments. a couple of shots and a rap with a brass screwdriver after the second adjustment got things right. The sabots shot a pretty clove leaf on the upper left 1" square and the upper right square that I tried the round ball on shot almost directly over the square on the opposite side! The round ball shot about 4" from point of impact for the sabots at 25 yards. I gave my supply of balls and patches to the round ball guy in the next booth. I cleaned with Black Powder #13 a wet patch and dry patch once during 20 or so shots to make the loading easier. I cleaned again when i got home and then pulled the nipple immersed the barrel in boiling water and ran it back and forth for awhile. When I could feel the heat in the barrel from the breech end. I took it out ran a bunch of flannel patches thru, regreased the nipple bushing, and put olive oil inside the barrel. That was Wed. Today (Monday) I ran #13 thru and found some black residue. Worked on that for awhile, regreased the bushing, ran dry patches then olive oil thru. I wonder if what I found was melted sabot? We'll see how that works for maintenance. By the way, I tried loose Pyrodex Rx and pellets (two) and did not notice any difference. I think I'll keep the loose powder for the 12 ga. double. Bill