This started as a M700 ADL. Converted to BDL...
Did you use the ADL magazine box for the conversion? The ADL boxes are taller than the BDL. You may have everything tight, but it would still allow your barreled action to move in the stock. Open your hinged floor plate and make sure your magazine box will move/wiggle with your action screws tight. If it wont' move I think that could be your problem. I had it happen to me.
