I just bought a Desantis Speed Scabbard for my M25. Seems like a very nice holster and I was quite surprised to find how close it holds the big N-Frame to my body. I really like how it covers all of the gun, leaving only the grips exposed. This will give it excellent protection in the woods when I'm not using my flap holster.

For field use it hard to beat a flap holster. I'm a die hard leather fan and have found Triple K's flap holsters to be excellent. I've got two of them and IMO, that are on par or superior to my dad's Kramer that cost twice as much.