Hmmm. Let's see. Dissecting .22 ammo to get powder to avoid .22RF shortage woes. Makes sense to me!
(Kidding of course. Any experimentation is good for the furtherance of general esoteric knowledge.)
As for grease grooves on the bullet- when you finish being the guinea pig I'll order a mold sized to fit my throat with multiple shallow lube grooves a là Lee bullets intended for liquid alox-ing. I was a little skeptical of the roll engraving with a file routine- too easy to inflict slight anomalies, I would think. (That, or buy some extra lube grooves from you if you have some to spare. I looked on ebay and they're fetching too much on the open market.)
