Honestly,I thought cast lead in micro groove rifling doesnt work very well due to the scant lands and grooves.My 44 would only shoot jacketed with good accuracy or was I doing something wrong.I used ww296 powder for jacketed and h110.I did a test with alliant 2400 powder to drive the cast lead out of microgroove and it worked pretty good but even with hard cast ,it leaded the barrel and would assume it would in a .357.I love your choice of guns as a blackhawk is a joy to shoot.I have a classic in .218 bee,what a hoot.It is very accurate. I wish I had the .357 model as I think the smartest fun lever ever.
