I've used No. 9 powder in all 3 of my eagles, .357,44mag,and big daddy 50!(all with 6&10 inch barrles with no problems at all going on 14yrs know.using winchester primers. just remember that you'll use jacket slugs!!! useing rcbs dies I've used sra 250
fpj , and hdy 300xpt and like the 300xpt better (44 mag) in the .50 its the spr 325 , 357 its the hdy 180 xtp. ,...