I have a TC Contender w/SSK 14" barrel and it is a hoot!
I also have a 15" Encore SSK 45-70 w/the SSK porting for pistols. In longuns there is not much more fun than my Sharps, 34" oct. Barrel with 405grn cast, 50grns of 2F Swiss Black Powder.
On my Contender I shoot the 300grn JHP Sierra with IMR4198 at 1405fps and this is a puff cake load. Some recoil but lots of knock down power. I have taken whitetail with this load out to 100yds and its bang/flop. You can also shoot it a lot at the range without wearing on your wrist.
On the Encore I shoot the same load and the 405grn Cast I use in my Sharps. It has a little more recoil but is fun. I like to shoot at the steel gongs. Line it up, squeeze the trigger, bang and then a little latter, another bang when it hits the gong.
Lots of people at the range have come over to see what I'm shooting and I let them shoot it. They get a kick out of it.
Lots of fun.
Mike