I'm a new member trying to find some proprietary polycarbonate sleeves for the ".357/44 Bobcat" It is a cartridge from the early '80s Bob Booth designed that used these sleeves. These are not sabots,

I have finally begin to run low on sleeves and can no longer find a source.

Any clues will be appreciated.

Thanks,
Bill

Thats a new one on me.
Can you post some pictures?

This sectioned view may help. The sleeve stays in the chamber after firing.

The loading data is the same as the Bains & Davis wildcat. Due to the bottleneck, the D&D case could set back sometimes and drag on the recoil plate. The sleeves help prevent this.

Bill

http://www.billkelsey.com/gpbill/bobcat.jpg