Yeah, you probably will have to get the aftermarket bottom metal. The Trophy hunter package does have a DBM setup and the mag housing is integrated into the stock so you can't remove it. (at least with the newer models).

The easiest fix is probably the blind mag setup, as all you have to do there is pop the bottom of your current DBM and insert the mag into the blind mag slot in your new stock (Will probably have to get the "L" bracket from Savage to retain the mag in the stock. That's how the Boyd's stocks work anyway. Would think the B&C would be similar.