I was interested in buying a double chambered for the flanged .333 about 8 years ago, but the bores were very bad and I couldn't get it to hold better than 5 inches at 50 yards! Pity, it was a Jeffery 'Maharajah Gun' with the prowling tigers engraving, externally the best example I have ever seen!

How crisp is this baby?!

Here are the proofs:

In 'British Single Shot Rifles, Vol.3', Wal Winfer reckons that most of the .333 Farquharsons he examined had stuffed bores, and speculated that the combination of cordite and chamber design was to blame. That and the fact that it was such a useful cartridge, most rifles so-chambered were very well-used!

The .333 in either guise should be no problems with modern powders, of course. Good luck with the project, rm.