Don't know about the BIG bore Kynoch ammo boxes but about 10 years ago Speer packaged their 375H&H african loads in twenty round boxes that had 4ea, 5 round boxes inside. The 5 round box was perfect to fit in shirt pocket. I used the boxes for a couple of years but they finally wore out. I thought it was a slick idea but certainly cost more I suppose. I would BUY some of the 5 round boxes if i could find them.