I picked up this full box of Kynoch .577/450 M-H smokeless cartridges just as our local gun show was about to close yesterday. It was quite reasonably priced ($25), and I was surprised it had made it through the entire day without someone snapping it up. For once, I was glad that there weren’t mant cartridge collectors here in Tallahassee.
What I found unusual about the box is the date code on the back, which was not the usual number and letter combination that were typically used on these commercial boxes.
I believe there was a thread some time ago on interpretting the Kynock box codes, but I have not been able to locate it.