WRF works just fine in my '68 6-1/2"-barrelled Single-Six, 4-3/8" Colt Peacemaker .22 and 9422M Trapper. It hits about 1" lower than WMR from the rifle at 25 yards. From the pistols it hits about an inch higher at 15 yards than WMR because of the slower-travelling heavier bullet. I like the...