alan4620
Years ago I had a BH .357/9mm convertable. I shot lots of 358477s sized .358 in 9mms. I backed the size die out a tudge to just partial size the cases where the .356 diameter plug of the .38/.357 expander woud be a slip fit in the case mouth. It belled the cases ok. I seated the bullets so the case just covered the lube groove. This let the bullet enter the cylinder throat aand probably helped with accuracy. The taper crimp die removed the case mouth bell. I used Unique (sorry forgot the load) and was getting right at 1,000 fps with them out of the 4 5/8ths barrel. That load shot as well as my best cast .357 load (both would do 1 1/2" or less at 25 yards going twice around the cylinder) Never should have traded that revolver off........
Larry Gibson