This target has 4 groups on it. The top left group, is an offhand group of the load that shot the centre group off the bench. The to right group is an offhand group of the load that shot the bottom right group off the bench. What I was attempting to do, was to show the enlargement of a group when using a less accurate load. The mould is a Lyman DC .400" mould. The hole closest to the hinge pin, casts the oblong ball.
The top left and centre bull groups were shot with .400" x .440" balls and a .215" thick patch. I lost track of the number of shots on the top left target and put 6 probably, but maybe 7 into that group. Talking to people while shooting and loading can be distracting. The rest are all 5 shot groups.
I do not know why I listed the ball diameters as .395" on the left & centre bull targets - It's a misprint - my fault - sorry for any confusion this may have caused. I just noticed this error. I actually used the .400" X .400" balls from the front cavity of the Lyman DC mould.
My .395" SC Lyman mould actually casts .398" x .397" in dead soft lead which was Hospital X-ray wall sheeting. It's the purest lead I've seen since 1972.
The top right and bottom right groups were shot with .400" X .392" out of round (oblong) balls and .0200" patch, other wise the same load. I do not think the change in patch thickness of .00075 would make that much difference, but attribute the loss in accuracy to the out of round balls. It appears I ran out of the .0215" ticking and subbed in 8 ounce denim.
The bore of this .40 cal. Goodoien rifle barrel is .398". The first load (best accuracy) had 12 1/2 thousandth's compression in the bottom of each groove, more on the lands, of course. The second, looser load on the .392" side, had from 11 thousandth's compression to .007" compression per side with the oblong ball.
All shooting was at 50 yards.