I think i just got the best idea ever.
The simplest solution is usually the best right?
.....
Ever had a look at the Mitchell Arms teardrop mags? They worked, but were a PITA to load. A spring loaded belt, but because of the requirement to feed the cartridge forward, it had to be contained inside the mag body.
The problem I see with using part of the bolt momentum to haul the ammo through, is that you need a link system that allows the cartridge to be pushed off the link, towards the front.
The Lakeside (who took up the Tippman designs) belt feds, use the same system as the Browning full size guns. The top portion of the breech block picks up the rim and pulls it off the belt when the block is forced rearwards from the firing. During the cycle of the block, rearwards, then forwards, that cartridge is moved from the upper position, to the lower position, where it is placed in the chamber, where it is fired.
The cam you can see on the feed tray cover of the LM7 is for advancing the belt, during the cycle, and another cam track takes care of advancing the cartridges in turn, to the firing position on the bolt face.
There is a whole lot of internal motion going on inside one of these guns, with a pile of little parts.
An animation worth a look.
http://www.coz-fx.com/animations.htm
The start of this vid shows the action pretty clearly too.
http://www.videospider.tv/Videos/Detail/4132080621.aspx
Whether you use a belt, or disintegrating links, you have to get past the need to extract the cartridge from the belt, by pulling the cartridge to the rear.
I'd like to see someone build a snail drum, similar to the PPSH drum shown here, for the 10/22.
http://www.canadiangunnutz.com/forum/showthread.php?t=262220&highlight=ppsh+drum
I think something like that would be a pretty darn good seller, despite whatever silly price was attached to it, and a whole lot more practical than having to totally gut out and rebuild a 10/22.
Cheers
Trev