With my .54 I do a lot of shooting using .45 caliber bullets in a .54 sabot. That's one of the benefits of the .54 caliber, one can shoot .45, .458 and .50 caliber bullets in the proper sabots. If one wants to shoot conicals it can do that too. As far as my favorite caliber, .45! I have a custom in the works now that should be done by the end of the month.