Re: Savage MKII FV-SR questions..
Yes they are very accurate out of the box but the accu-trigger allows for a little tuning. Some guys are even swapping the spring for a 10FP spring which is 2 coil shorter.
As 1shot2kill said I don't think they're quite as big as a 10/22 bull barrel but close.
The TR's have a 22" barrel, the FV-SR has a 16.5" threaded barrel. The FV has an 'el cheapo', but lightweight, plastic stock and the TR has a slight variation of the Tacticool stock. The tacticool stock has a raised comb.
Yes you can, and many people do, put the the tacticool stock on the FV-SR. In fact I'm waiting on mine, should have it Wednesday. You'll need a new trigger guard and bottom metal. The thicker bottom metals like DIP allow you to torque the action down a bit whereas the OE metal is pretty flimsy. I didn't think it'd be a big deal but the OE metal truly is pretty flimsy!
Generally most people really like these rifles, especially the FV-SR as a suppressor host, myself included. Tough to beat for the price, but if you don't mind spending a little more the CZ452/453 are said to be excellent choices. Check out RFC for more in depth info on the Savage MKII's.