Precision Rifle Gear 6-284 short action box mag

New member and looking for some input……. I’ve got a 6-284 in a Remington 700 short action sitting in a HS Precision stock. I’d like to put the barreled action in a chassis or a different stock with m5 bottom metal. My question is…. Is there a box mag that will work for what I’m trying to do ? I run primarily 87gr V-Max’s at a COAL of 2.815 Any help would be greatly appreciated, thanks