I cast my own bullets and use the H&G #251 double ended W/C. It was designed for the 52 S&W to be seated flush. However, in the revolvers, I seat the first band out (similar to "nitesite" above) and crimp on the trailing edge of the first band. I also seat the sprue up. It is a bit ugly, but that way I have perfect bases - this is helpful to accuracy. I run these a bit faster than the hollow base wadcutters as they seem to group better (well under 1" at 25 yards off a rest). I use 3.5 grs of Bullseye and lube one groove.
Seating the band out helps to true up the bullet in the throats and as "nitesite" mentions, they are a bit easier to chamber. Here is a picture of a four cavity bullet mould with the #251 H&G:
The picture is courtesy of TexasFlyboy, the authority on H&G Moulds.
Dale53