Hi guys. 1st post here. I've finished up a build recently using various parts based around a Stevens 200 receiver. It is a stagger-feed, blind box which is attached to the receiver. I've got the rifle shooting pretty well and am still working on different loads, but haven't tackled the mag feeding part yet. The receiver is from a .243 rifle, but it's now a .223. My question is: can someone measure, or does someone have, the inside length of a factory .223 mag box so that I'll know the max OAL I can load to while still feeding? Thanks in advance...

J