So here's an update on where I'm at with the gun. I actually shot it today.
I order "Sharps" style inserts for the globe front sight. They're not correct either. That being said, I was able to modify them with a Dremel to get them to work, and they don't shake around. There's only one other style of insert of Track of the Wolf, so I may eventually buy those, but for now, I'm just using these other one.
I have all my reloading gear together or ordered. I took the box of 20 Remington jacketed bullets I bought and pulled the bullets for the brass. I also purchased two boxes of Ultramax 405gr lead "cowboy" loads. They're advertised to run at 1050 fps, which is lower than any "trapdoor safe" reload I found, so I'm not worried about overpressure. I most bought them to zero gun and get some brass.
I tried the gun out at 50 yards today. The tang peep doesn't work at that distance with the Ultramax loads. Even with the sight bottomed out, it was shooting very high, probably 8" or so.
The Buffington sight worked like a charm. I used a standard post insert for the globe front sight, and the notch at the bottom of the "Christmas tree" on the sight. I made a adjustments to get the elevation on and I was good to go. The gun is shooting a bit to the right, so I need to adjust the windage, but that adjustment on my sight is very stiff so I didn't want to crank on it at the range too hard.
For this target I was benched, and I just held off a little to the left.
About a 1.5" group center to center, which I think is pretty good for factory ammo from a brand not known for its precision.
This next target was also shot at 50 yards, but I was standing, unsupported. For this, just keeping the extremely heavy gun up was hard enough, so I just *tried* to hold right on the target, which is why the shots are further off the right.
This group is about 2.25 inch.