The T-EZ might work. Any 45 caliber XTP in a crush rib sabot might work. The SST in a low drag sabot might fit your barrel, but perhaps only for shooting practice, not hunting. A 44 caliber XTP in a green crush rib sabot might work.

A 90g load of powder might be a starting load.

workin247365, keep in mind, your barrel is your barrel, and you must fit it yourself. Try and have some fun with it!