I use a lot of MTM 50 round boxes with the actual hinge. They work fine for the price. Have a bunch of the 9mm size a lot because they are perfect for 32 S&W Long loaded with 115gr flat noses. The 100 rounders are a bit unwieldy to me, but that's just personal preference.

The MTM and Berrys hinged lid 50 round boxes have both worked fine in 223 size for holding .222 Rem and 300 Blackout.