Those are 7.92mm armor piercing cartridges, your pictures are too small to see the rest of the box markings but they may be the *improved* series looks like those are 1939.
Might be 7.92x94 for the panzerbuchse anti-tank rifles. Pic of box is too small to read the makings. Case length would be a bit under 3.75" if that is the case.
It took me several times looking at the page itself, but I finally read the download button. No matter what, the link downloads the image, rather than displaying it in the browser.
However, here are the URLs that directly download the full resolution photos:
First image: http://imageshack.us/download/924/BOAUNs.jpg
Second: http://imageshack.us/download/921/4ggtoB.jpg
Hope this helps. I have no idea what they are myself.
--Rick