Starwars-

Welcome to the site!
Also, on your Nowotny, I'd really like to see some photos of your rifle.
Can you snap some shots of it and post them on a new thread?
I've seen some very interesting and very unique Prague guns, and the thought of a J Nowotny underhammer from that late in the 19th century sounds neat.
Can't wait to see it.

To the original poster of this thread, I recently got a Lyman stainless deerstalker in a swap (was going to gift it to an inlaw)
It's got a pretty fast twist rate, I think it's a turn in 38 inches, the stainless model was set up to run saboted sub caliber bullets.
I was very pleasantly surprised to find that 110gr FFg, a .530 ball, and a .020 denim patch would consistently rip ragged hole groups, without cleaning issues!
That powder charge was right at the limit of where the patch material would perform. I've settled down to a 100 grain load for that rifle to make sure I won't be blowing patches.

My squirrel rifle, my 50 caliber plains rifle, and my 16 bore double rifles all have much slower twist rates and shoot very well and are really easy to care for. I definitely didn't expect the Lyman to do so well at all, especially with round ball, especially with such a powder charge.
But it did...

--Tinker