Interesting that on reading some testing of original Kynoch 416 Rigby loads velocities were around 2150fps, not the 2350 or so fps advertised. The 404J may have been lower than advertised 2150fps as well.

I had a nice little takedown 404J many years ago. Hard to reload for (handmade dies and before Woodleigh bullets) however RWS ammo was reasonably cheap and available. From reports I have read, it chronographed in excess of 2300fps. I never had a problem with high pressures, and reloaded the fired cases.

It certainly is a cartridge for which I would like another rifle, having a set of RCBS dies and a Lothar Walther Prefit barrel to suit a '98!