Like to know more about the cartridge, wondering if anyone here has worked with one in a Cooper model 38.

Many Thanks

HBH

Small Caliber News has quite a few articles on it, there's also handloading data in the .17 Caliber Manual "the Sensational Seventeens" put out by the Woodchuckden.

http://www.smallcaliber.com/

Thanks for the info.
Trying to learn as much as I can.

Many Thanks

HBH