Most SWCs and RFN bullets can be seated deeper in the case, crimping over the shoulder of a SWC or over the ogive of a RN. Seating deeper like this in 44 magnum cases will be very close to the OAL and powder capacity of 44 special loads. Fast, bulky powders such as Red and Green Dot, American Select, 700X, V320 will all give good consistency and accuracy with light loads, no fillers needed. One of my favorites is a commercially available 200 gr. RNFP which is HiTek coated seated to 1.485" OAL in 44 magnum cases over 4.5 gr. of 700X with WLP primers. Gives about 865 fps from my 6½" 629 Classic and is very accurate and light recoiling.