I searched but couldn't find a good answer to this one.

I have a model 12 FCV on the way and wanted to buy my scope base. I can either buy 2 of the # 46 bases or a one piece base (Weaver 48338). I would prefer to buy the 2 piece base but I am not sure if the screws are the right length. Will I need to start grinding down the screws that come with the # 46 bases so they don't interfere with the bolt and don't hit the barrel shank?