How are you planning to form the pocket cavity for the skirt?
RedFeather (Login RedFeather) Owner Moderator Posted Feb 5, 2012 10:04 AM
I've used three-part Minie bullet molds but I don't think that approach is doable with such a small pellet and thin skirt. If you need a waisted pellet, perhaps swaging a round ball (as in the linked photos) and then making some sort of V-shaped roller to form the waist? Then again, you could also make a two part mold to pour a solid diablo and drill out the rear as a second step. Be tedious but possible.
Since the .25 weighs more in the range of small rifle or pistol bullets, have you toyed with the idea of some sort of sabot? A sub-caliber round of the same weight might work.