Thanks for the advice guys...

I've heard similar stories about the .222 Rimmed sticking with Bertram brass, but not with the original Super brand cases... seems to point toward case head expansion issues, as the .222 Rem case doesn't seem to have a lot of taper to it.

Xausa and Daryl that is an interesting theory... sounds very plausible!

BTW does anyone know if the BSA International action body will accept 'standard' Martini Cadet internals?

That way, the .22RF BSA International action body, with its adjustable trigger and thicker sidewalls, hopefully could be converted across to CF just by swapping the .310 CF falling block and bushing the firing pin for the higher pressures?

While they ARE drying up, there's still plenty of Cadet action parts at regional gunshows in Australia... and while Francotte actioned Rook Rifles are going through the roof, BSA Internationals are often found at bargain prices.

Tatume
Plenty of complete Cadets come up for auction here (and he will send to the US):
http://www.australianarmsauctions.com/

Ray Jansa also has Martini actions from time to time, one listed now for A$225
http://www.jansa.com.au/access2.php