No so. I've only ever use long boxes in my Limbhanger box call pocket. I have a Beardhunter long box, a Q.B. Boat Paddle, and a Newman's Gizzard Getter that will fit in that box pocket. The trick is to put the strap of the vest pocket between the box base and the paddle, then adjust the length of the strap to secure the box. I keep a call silencer on the call when I'm moving around, then put the silencer on the strap and clip the strap closed when I'm using the call. It works great and I've not lost a silencer yet. I'm pretty sure that almost everything else would fall out of that Limbhanger vest before one of those long boxes would. I can post pics if you need 'em.
Jim