Check with Mr. Smoke about shooting large, heavy projectiles with large powder charges, as he did/does it for pure fun!
Yessir, that I did. There is just something indescribable about touching off 400 grains of Fg pushing a 1,450 grain round ball out the barrel. Did it hurt? Nah, not really. Did it kick? Well, hell yes. But no worse than getting punched in the shoulder by a fair sized man. Did I do it again? Well, of course. Actually, that four bore kicked less and hurt less than a T/C Renegade I converted to a .62 caliber rifle. That was brutal. As a .54 rifle with a 100 grain charge it was not a big deal. But going up to the .62 with a 310 grain ball and 200 grains of Ffg - totally different story. I believe the real difference was the stock design, way too straight to handle recoil efficiently.
As far as shooting big guns go, I kind of liken it to the difference between driving a Yugo to the corner store and driving a Corvette there also. They both get you there, but the Vette is a heck of a lot more fun. And the big guns are a lot more fun to shoot, although it does take a bit longer for the smoke to clear. Hint: My moniker was fairly come by - Big Smoke, think about it.
Kevin,
My opinion on your rifle is that your stock is too straight and you are shooting a heavier charge than you need. Obviously, I have not shot your smoothbore, but from what you have said, that's what I hear.
John (Bigsmoke)