The rifle orwapitihunter is talking about was mine. I've had Kevin Wyatt do quite a bit of work for me over the last 15 years.
What I found is that the extended mag box was a hair too tall for BDL/CDL use, but maybe that was because I was using a McMillan hunter's edge stock when I had it in BDL form. If the sheet metal is too tall, then instead of the stock screws pulling the barreled action into the stock, they're bending the action using the sheet metal as a fulcrum and you never do get good contact between stock and action ... accuracy generally suffers.
With a BDL/CDL, assemble the rifle, torque the action screws, then open the bolt and floorplate. Stick your fingers in the mag well and see if you can get the sheet metal to move around just a teeny bit. If it'll move, fine, if not, its bound up and you'll likely have accuracy issues.
I'm not a gunsmith, I'm a spazz with a Dremel tool. Fortunately, us spazz-with-a-dremel types can't hurt things too much if we just trim sheet metal.
For ADL use, instead of being too tall, the sheet metal is too short.
Before doing anything, I'd discussed the problem I had with Kevin Wyatt. I'm not sure that what I ran into is a problem with all ADLs, could just be the LVSF stocks. In any event, the sheet metal with slide down in the mag well just enough the bolt face wouldn't pick up cartridges from the magazine. What Kevin suggested was to epoxy shims into the bottom of the stock until I'd built up a block tall enough to push the magazine up close, but not snug (see above, BDL/CDL situation). The idea of gluing the sheet metal to the action (that was Acraglass) was my hairbrained scheme, can't blame that on Kevin.
Tom