You know, we could kneck the .45 or 10mm down to .30 and then use off the shelf sabots to go .223. I know some people who use Ruger Revolvers in .30 Carbine with the sabots and .223 projectiles and it is "interesting".
BTW, there is a company that specializes in making sabots. I bet they could make 10mm-.223 sabots for us and then all we would have to do is load development, no gun/barrel mods.
[This message has been edited by TED (edited 04-21-2000).]