JasonShore,
The williams floorplate for Remingtons is not the same dimension as the factory BDL floorplate. The Williams is far superior and held to much greater tolerances. There are different "relief cuts" for the Rem and Williams floorplates that we inlet. If you ordered your stock with a Rem BDL floorplate, it will not look right/fit putting a Williams in it instead and vice versa.
You can see in the pictures above that the Williams has a extended/straddle hatch that extends just past the front of the trigger bow. The Remington does not. The Williams inlet here at McMillan has a larger relief cut at the rear so the williams floorplate will close and accomodate this. Unfortunatley i do not have a picture of a Williams inlet to show you.
The BDL relief cut or shadow line is there because over the years we have found, depending on where they place the pin on the hatch, they come with different tolerances/gaps. Sometimes .040" differences between floorplates, just depending on where the pin is placed. So we've made the "relief cuts" a little in front, behind and along the sides to all Rem BDL floorplate inlets, so no matter where the pin is placed, it will drop into our stocks and sit flush with the stock.
Hope that cleared any confusion up, sorry i posted so late, been kind of busy here. If you have anymore questions feel free to ask.