Need help with a repoduction Sharps
I use Unique mostly, and also Red Dot. My loads are mild, in the 1350-1500 range, and I see little or no leading with the Meister hard cast.
I have also used 3031 in the past, and it is an excellent choice for cast or jacketed bullets. With a 300 gr. jacketed I used 48 grs of 3031, which is not harsh recoil, but will definitely bring down the game. I used 45 grs of 3031 with my 360 gr cast lead. The 300 grainers you bought should do OK, if your twist rate isn't too fast. They work best with a twist of 1-24 to 1-36, but I've used them in my Ballard #4 with 1-18" Badger barrel, and they shoot well. The key is to not try to push a light bullet too fast, in a barrel with a fast twist.
Hope this helps.
Ballard, the great American Rifles!