Like they said. It's a fixed internal magazine where the bottom floor plate opens out like a small door. So, imagine the floor plate of a detachable magazine except that floor plate has a hinge at the front end where the plate opens out, but the magazine does not detatch, the magazine spring and follower are also attatched to that floor plate. On the 700 BDL the floorplate release is a flush square button in the trigger guard just forward of the top of the trigger.
A word of advise with that 700 BDL. Don't allow the bolt to slam forward on it's own. It will easily do that when the action is open and the rifle is pointed muzzle down. Also the 700 BDL will need to be fitted with a much better aftermarket rubber recoil butt pad. Consider a Pachmayr butt stock recoil pad. For some odd reason Remington has found it cheaper for them to put a basic hard plastic butt plate on that gun, and those tend to really make shooting it (in a caliber like .30-06) very uncomfortable. Hope this helps.
Bring them in on a string. I love this term, if you want to be successful on calling in Elk, try not to just sound like the other caller. We all laugh at each other when we are practicing Elk calling at home or while camping. When I first started calling in Elk, I had no idea what i was doing and it's funny how many I could call in. The biggest Bull that I have called in to date was actually my first. I was making cow calls and screwing it up big time. But it's obvious I didn't screw up...