I've been searching the webs, but not finding anything on the dimensions.
I did however find that the magazines are the same for the Patriot as they are for the 4x4 and the Troohy Hunter II which is a Savage rifle.
I have to say I'm a little confused as to why you ask, I'm not connecting the dots. But I'm not a reloader either.
Anyhow, welcome to Mossberg Owners and I hope we can get you an answer!