You can try it Bill. I've only tried Gas check designs. You only need a dozen or so for a season of hunting, so the time to make them is not a problem. I use a cartridge case trimmed to make a ladle of the correct size for the base metal. Then just use the lee pot to pour the top metal. BruceB on cast boolits does it with a some what more involved procedure. He REHEATS the mold with the bullet inside so the metals melt and fuse better. I've tried both ways and being LAZY, like the easy way. Accuracy wasn't that much different either way in MY guns. I used molds from 30 caliber to 45 so far. Smaller ones are harder to get good results with