Welcome to the club!!!!!!!!!!!!!!
We found a great load for them.
The powder is Trailboss , the bullet was SNS coated SWC 215gr,the primer was winchester.
Full length size, prime , 6gr powder[1/2 gr under book max] seat and HEAVY crimp.
The trick is the near full case, hot primer , normal weight boolet. and good crimp..
Of the 5 guns tried 3in 657,4in 57 , 4 5/8 ruger,and two custom New Vaquero's 3 1/2 in and 5 1/4 in ,
all would print 6shots touching at about 7yd , hit well outside and had very mild kick.