If you are serious about shooting cast bullets, I suggest you visit Beartooth Bullets (beartoothbullets.com). Marshall Stanton makes some of the finest .44 cal. LBT bullets in the world.
Careful reading also should be done there on the relationship ofbullet sized diameter to chamber throats. The fit there is the most important factor is accuracy.
If you deside on buying a mold, check out Mountain Molds........James
Dixie Slugs (dixieslugs.com)-Home of the Original Terminator Slug