Hello Charlie,
Hey I got a deal on 8 pounds of W630 and a 54 caliber Senca barrel for $120
at the Flea Market once.
I loaded up the powder in my 44 mag. and the higher the charge the better things went.
The two powders seem so close. Try this site:
http://www.gswagner.com/bigreloading...rburnrate.html
Happy shooting
Scott5