If elmer recommended it, you can't go wrong. I really like the 120 lawrence holster myself. The only maker that seems to be making a copy of this holster is el paso saddlery and they have a long wait and unlike the lawrence their safety straps are not long enough.
Have had no leading problems, the main thing is to not use magnum primers as this along with 2400 powder causes a lot of pressure, so advise using large pistol primers.