I have a .270 Savage 111 w/synthetic stock. I am looking to replace the stock with a wood stock from Boyds. It would be a walnut, right-hand, bottom bolt release. The description says "If you have a XP model with a synthetic stock, you will need to purchase the SAVAGE LA PLASTIC MAG WELL". I thought XP refers to a Savage rifle that sells with a scope. But I don't know what they mean here. I know that some wood stocks need something to reinforce the mag well. But what does "XP" have to do with it? Anybody know what they're talking about? Thanks for any help.