Originally Posted by 4kingu
Okay i thought about it some more. Why not have a multi-chambered design. The bottom is rimfire design, but the next section is center fired equivalent built with a stronger cartridge material to withstand higher gunpowder. Similar to a multi-stage rocket ?
Cost I'm sure is much more than current rimfire.
Why not shoot a .222 remington or .22 hornet if that is the velocity you want? There is a round for any velocity you want in .22 dia bullet. Why re-invent the wheel?