Just went thru a nutroll with my stepsisters triumph
Go to Randy Wakemans muzzleloading forum and do a lot of reading.
Randy Wakeman on Inline Muzzleloading
They are super tight bores and have a problem with a lot of normal bullets
Bottom line is 100-120 gr loose 777 powder is a go to load
Swab between each shot! Then fire another primer only to clear flash hole.
I like the TC T17 cleaning patches and T17 seasoning patches.
Bullets- Hornady 240 XTPs
Barnes Spitfiress T-EZ for tightbore guns. Either 250 or 290 grain
A lot of people like the Blackhorn 209 but 2x as costly. 100-120 grains