On this topic, for those interested only. I shoot the DW 7360. I use
the Lead Heads 35-200G. The proof is 1-1/8" at 100 yards and 6.5" at
300 yards, the latter being with open sights. The bullet took me to 2nd
place overall in the IHMSA wheelgun world this past year. I lost to one
FA with a perfect score (but I beat 34 others)

That bullet and about 12gr +/- of W296/H110 (same powder) is a good
starting place in the 357Mag. You will need a fast twist in the mag. I
have the standard twist in my 360. Either works the same in that gun.

(Shameless Plug) I also sell the Lead Heads product line. ;-)

Mr. DW