first, you should always use a small rifle primer due to the high pressures generated by the 357 Max (357SM).
second, the Leadhead 205 Gr bullet is a Saeco bullet
But the saeco and RCBS bullet are very similar in design. the other 200 Gr is too long for a 357SM revolver (PL357-200 WFN).https://secure25.securewebsession.com/p ... /order.htm
and last, I use 2 different powders in mine.
IMR-4227 for high velocity. AA MP-5744 for lower velocity.
do not use the ball powders such as 296 or H-110 as these are what was causing the top strap cutting when the 357SM first came out.