I'm pretty sure it won't fit directly. I have an '06 ATR and a .338 4x4. The rear action screw of the 4x4 is 1/8" further back than on the ATR. This bolt hole in the Boyds stock could either be filed oblong with something like a chainsaw file wrapped in sandpaper, or it could be filled with a dowel and re-drilled 1/8" further back. The next issue is that the Boyds stock will need to be adapted to the 4x4 magazine. The magazine is what holds in the rounds and lets them feed up into the action smoothly on the 4x4. The action itself is machined too wide where it meets the magazine to hold/feed the rounds if the magazine isn't present. One could possibly get around this by cutting two thin strips of sheet metal in the correct shape to simulate the top of the plastic 4x4 magazine and securely gluing those to the bottom of the 4x4 action opening, then use the ATR integral magazine parts to finish it up.