You're probably going to hurl, but I LIKED ham and MF-ers. I heard that some guys found another use for them. The M60 machine gun had a bad habit of jamming if the belt didn't feed in just right. They took a full can of ham and MF-ers and fastened (welded?/brazed?) it to the feed tray. The belt rolled right over the can and fed into the gun without any stoppages.
You're right about using C-rat cans for a M-60 feed tray! Only I forgot that ham-&-mfers came in the same large size can as spaghetti-and-meat-sauce. Clamping that canned spaghetti (which wasn't bad!) to your door gun to insure reliable feeding was a real sacrifice, ha!