dogslayer
I have a Lyman Trade Rifle, 54 cal, I really like it - it is really reliable - it looks and it feels good. It shoots great.
Shooting pellets in a side hamer is always a "crap shoot" as to if you can get them to ignite or not. In warm weather they probably will. I personally would not count on them. You would be far better to use a loose powder. TC does make a breech plug that is called a snail channel and it will ignite Pyro Pellets fairly reliably - but would not count on T7 pellets working.
Good luck in your quest - hope you get a good one.....