Using them in 38 Special, .357 Mag, 41 Mag, 44 Special, 44 Mag, and 45 Colt.
They first apply a gentle taper, and can be adjusted to finish with an extremely uniform roll at your desired level.
I've tested them back-to-back with loads using Lee, Lyman, Hornady, Dillon, and RCBS crimp dies, and in ALL cases the Redding dies produce more accurate ammunition.
At the prices I charge that's imperative.
"All my ammo is factory ammo"