Well if all goes well, I plan on shooting my .40 caliber (13lb) Flintlock Chunk Gun from one of the benches at the Range in the morning.
I made a barrel "cant" block for it today in a somewhat quite warm workshop - but I got it done. I have never used a "cant" block attached to the barrel before, but I can certainly see where it would be handy. I got the idea from watching a video of some "chunk gun shooting" and thought, what the heck I can make one for my rifle. I made it out of an old maple chunk of wood that I had laying around from a maple stock I made for one of my rifles. It ain't pretty, but it ought to work.
I'll post a picture of it sometime tomorrow after I get back from the Range. I'll attach it behind the barrel's first ramrod thimble (4-1/4" from the muzzle)... I don't know why I even build the rifle with a ramrod accessory as it's not a rifle I'll ever shoot offhand - but what's done is done, and it ain't a going to change now. It's going to get the block.
I'll set my target at 60 yards as that's the historical distance for chunk-gunning (unless you shoot the match offhand from 40 yards (which ain't going to happen with this rifle)...
To be honest, I can't remember what charge I was shooting in this rifle - so I think I'll start building a load from 45 grains (which should give me a tad over 1700 fps) - and go from there. With a 1 in 48 twist in this Green Mnt Brl w/ .010 depth rifling - this ought to be a good starting point.
Nice thing about chunk gunning (for those that may not know), I don't have to do any sight work - just aim at the same spot every time and when a group is established (where-ever that group may be on paper) that's where the "official target" gets set (behind your spotting target).
It's fun once you get going in it - and it'll be easier for me tomorrow shooting off a bench.