Ive used BH209 with several conicals and sofar 80gr and a felt wad has worked best in 3 calibers and at least 6 weights upto a 460gr Great Plains. Cupped bases seemed to give the best results in this combo in QLA and non QLA type barrels.

54cal Maxis also gave me very acceptable results with my moly/Alox lube mix in a GM54 barrel.