First shots, 1/8/2023, afternoon sun to rear over right shoulder, 25 yards, 21 degrees, no wind, sitting on a chair laying fore end on sandbag on a sawhorse, Hoppes black powder cleaner and lube, .350 Hornady buckshot, FFFg loads with 4Fg prime. Loads and patches as noted, sight adjustments as noted. 28 total shots and never once any thought that I needed to clean between shots. Original flint, that was snapped multiple times before and during construction, got dull and I swapped it out for a fresh one, part way through. Other than the few times the prime did not light because of the dull flint, it fired every time with one shot seeming a little slow, others seemed instant.
Target was a piece of foam filled white board, I drew 5 - 2" diameter bulls and made 1" grids around them
Group A. 30 gr., .015 patch 7 total shots a bit low and left. Shot 7 is just under number 5, a ragged hole.
Group B switched to 35 gr, stayed with .015 patch after 3 shots I tapped front sight over a little for 4 more, putting it closer L/R.
Group C, went to 40 gr and .018 patch, this was for sure the best 3 shot group of the day, still a bit low. I had also taken a few swipes with a file on front sight bringing group up a little.
Group D went back to 30 gr and .015, screwed the Lo Pro sight up 1 turn. Five shots with one Oops, that was when flint got dull and I cocked and fired 3 times before it went off, the last time not being fully settled on target when I pulled - my bad.
Group E went to 35 gr and .018, shots 1 and 2 good, 3 was probably me.
Lastly, Group F, looking back at group C I decided to go back to 40 gr and .018 patch. Two shots very good, touching inside the 2" bull, third shot out and low. Called it quits for today.
Shoots nice, no recoil at all.
Examined some patches, the .015" pretty much blown apart, the .018" looked good to me.