[quote=“30army”]…I assume they were produced until about 1962 or so ?
Actually Randy, Kynoch cartridges are still produced today and the boxes are identical red and yellow. The company producing them is a company called Kynamco Ltd but although they retain the name and produce many of the old big game cartridges they are not the old Kynoch company. They are a modern business that has bought the rights and were wise enough to retain the old “retro” appearence of the boxes, and indeed the ammunition. The ammo is produced to the original spec but using modern powders and Woodleigh bullets.
Kynoch ran down their ammunition production piecemeal as demand dwindled before having a last big production run and putting the ammo produced into store some time around the mid 60s. No doubt someone on here can provide an actual date.
Then, as I understand it they sold their cartridge case making machinery and tooling to Bertram. Again, no doubt somebody else on here can confirm or refute that but thats the folklore as I understand it.
The ammunition is very expensive, I believe we are talking in terms of about $8000 US per hundred for .600NE but that is no dearer in real terms than it would have been in the 1920s in England.
As an aside, and this is way off topic, if you look on youtube there is a video of some madman firing a .600NE pistol! Maybe now the ammunition is back in production we will see a rebirth of interest in the calibre?