I've got a Wilkinson identical to the one in the top post and that TH44 posted. It was one of 3 at the AK double rifle shoot where I had the great pleasure of making TH44's company so it might have even been one of the ones he shot.

With 70 grains of Goex FFG under a piece of foam backer rod and a 480 grain bullet it averages just 710fps, and 604 with the same charge of Fg. As for regulation....uh....mine at least shoots about 2 1/2 feet apart diagonally at 15 yards off of a rest. It's the only one I've ever shot so I have no idea if that is the norm or mine is somehow defective. I haven't measured the triggers but my guess is the front is around 12lb and the rear about 15, which certainly doesn't help. I can only guess that regulation wasn't a concern at powder burn distances and that you really really didn't want an accidental discharge into your elephant.

Recoil isn't bad at all as much of the powder burns outside the barrel. Feels about like a standard velocity 44 or stiff 45acp, if even that. I've got a video of trying to put 10 rounds on a steel target from last spring I'll post when I get a bit of free time.

As an aside, I did take it on a hunt 7-8 years ago. I went on a moose hunt but neglected to apply for a caribou tag, as moose was the focus. Naturally caribou were everywhere, and once while laying prone glassing a group split in two and walked around me at arms length. The next year I went back with a caribou tag and my howdah inside my jacket in addition to my 375. I couldn't get within 500 yard of a caribou without them winding me. Oh well.

Bob