I have the Chambers Colonial Fowler in 10 bore with a Cherry stock. I mention the cherry, because I'm sure that it is lighter than a maple one. With 120 to 140 gr FFg and a patched .715 ball, it is a handfull.
I took a bit more off the comb after it was first finished 'cause it clobbered me pretty good. Now it's OK,
but it is a hungry beast that wants to be fed! Lots of powder and lead. For what it does, I wouldn't trade it, but a day's target shooting is a bit much. I use the gun for hunting. For target, I use my 20 bore,
or my 28 bore. If I could have only 1, the 20 would do in a pinch, but I'd probably build a 16.
Haven't tried really reduced loads in the 10 yet, so maybe that would be an option for you.
The Colonial Fowler is a great gun.