I don't care for DM's on a hunting rifle. That said, one of my favorite rifles, my Sako 85, has one. It doesn't actually seem like a DM, you can leave it in the rifle and load through the top or take it out, as you wish. It's got a tricky little retention system so it's not going to fall out accidentally. I usually drop it out to unload it, but put it right back in the rifle. (I've had a couple of instances of having to replace lost DM's and their cost is way out of proportion to what it should be, IMHO.)
