I hope it shoots good for you now that it has had the barrel changed. I agree Cabelas has some of the most uninformed staff in the business and unless I know exactly what I want to buy and it's a good price, I would rather go to my Local shop to do business. most of the people have no idea what they are talking about or what they are selling. It's no better at Gander Mtn, or Bass Pro either. In my opinion, you deserve the rebate or at least a gift card to compensate the difference. If you fight for it, you may get it.

As far as the rebate form,
Actually, it says Model 12 and 10/110 BA (see link below). Since it didn't say 10 series or specifically the 10T, I decided to question everyone up front (and glad I did).
https://s3.amazonaws.com/savagefiles/promotions/web/sa143/SA143_SavageArmsSpringPromo_Coupon_fHR.PDF