I have a Savage 24V single shot, (.30-30 over 20 Ga.) I like to load the .310" dia. Hornady Round balls ( 45 grains ) . These shoot really good and are very quiet.
I load 3 grains of Red Dot, I use a 1/4 square of Single ply Toilet paper for a over powder wad. Tap it down against the powder firmly.
CCI primer, and seat the ball down just below the case opening in the neck. I then smear a little bullet lube or grease over the end of the case.
Mine shoot nice and quiet and are pretty accurate. You can experiment with powders, I think I have used Unique and green dot too. Seems like the Red Dot shoots pretty clean. I don't notice leading, mostly grease in the barrel. I used some old GI Graphite Grease over the ball before I got to casting bullets.
These are good Rat rounds.... Have fun !! "Papa Jack"
PS: I have fired over 150 of these rounds, I never had any Chamber Ringing....