Please note this is not about the 375/303 WR cartridge but rather a 303 Brit case expanded to the 375 bullet.

I have looked for info on the web with no real luck. (Other then people getting confused and thinking it is about the WR cartridge.)

Any info about the 375/303 would be welcome. Have you or do you own a cartridge chambered for it? Do you possible know of any web links discussing it?