My brother has an At 1, cheesy plasticy thing, hate it (he loves it of course)
Me? Some years back I got a Savage 110 in a 30-06 that had a TH Feathwerigth stock (thunmhole, made by Boyds for Savage)
I put a bull barrel on the 06, carved out the channel, best feeling stock of the 3 I have (I have another one on the way in Featherweight )
Where it counts is the bed area and those are the same.
They say you can't mill down the center stock to take a bull barrel but that is bull. You can and still leave a ledge on the sides. Its not thick, but its there and is fine.
Looks gangbusters nice and it feels better than the target stocks (one I had to cut the right side down to allow my earmuffs to ft over the stock)
The Boyds Savage fit is almost perfect (I relieved the tang area, the rest was spot on good for fit), you can get a pillar on the front and a lot of wood choices.
I get more compliment on the 06 setup, its a Nutmeg stock, people just love it as I do.
The new one will be Jardine, high gloss.