I think I've got it!
Out with my Shiloh #3 in 45-70. Glorious day, no wind at all for starters. First five shots I thought did pretty good at 600 yards. So I decided to push things for a 10-shot group, even though the wind was starting up. I got kind of "concerned" when the shot to the right made its appearance.
I decided to "anticipate" the wind on the last shot and it missed the target completely. Ah well, that sort of move is kind of my "trademark" anyway. Now that "salesmen" are "marketers," I guess I should say it's my "branding element."
Steve Brooks 550-gr Original Postell, 0.440" nominal diameter, cast at 8-9 BHN, wrapped dry with 0.0015" erasable bond paper. Federal GMM large pistol primer, punched over primer wad, 80 gr Swiss 1Fg, 0.030" cork wad, 0.250" compression, Lyman taper crimp. And a ridiculous amount of cleaning (8 passes) between shots with NAPA oil/water and Ballistol/water patches with one dry patch at the end. Not ready for Prime Time yet, but the concept has been proofed. Need to get the cleaning time down for the other competitors' sake. The 9 shots went into 11-5/8" vertical x 18" horizontal; I'm pretty happy when I can get the grease groove boolits shooting under 2 MOA. I was trying to eliminate another shot drifting to the right on the last shot. Wish I could call that one back and do it over!
But when I started, I couldn't hit the 400-yard target more than three times in ten shots, so I guess progress has been made.