The answer to this question is yes. I have a 5 cavity and it rocks. The group buy started over on CastBoolits allowed for a plain based or gas check shank. Also, we made the lube groove a touch bigger for more lube. If I remember correctly I think I started that group buy a little more than one year ago.
Mine drop at .360 and 162 grains using range lead. The gas check shank measures .341 on mine. It shoots awesome. Didn't have to fiddle with load developement very much. Shoot mine out of a GP100.