Winchester 540 MS powder
cbyerly Member Posts: 703 ✭✭
edited February 2017 in Perry Shooter Competition Shooting and Reloading Forum
I have a usable lb of this powder. I cannot find shotgun data for it in any manual I have. The load data available is for 540 but not the MS, I would like to know the difference and what data to use. It appears that the MS data will be found in Winchester manuals published before 1969.