The average savage model 340 is currently valued at between 100-200 dollars depending on the condition of your firearm.
The value of a savage 340 BC 222 rem would actually depend on a couple different things. Some of these things would include the age and condition.
savage arms
Savage (Stevens) Model 340
Between 80-225 dollars,depending on overall condition and a good bore.
The savage model 340 series was made between the years 1950-1985.
1950
http://www.thegunrack.net/Magazines/centerfire_rifle_magazines.htm This is a Savage model 340, magazine in .222 caliber costs $24.95 plus shipping from this site.
You need a Weaver Side Mount #2 (which is the base). Weaver also make 1" side mount rings that mount onto this base. That's what I have on my .222 Savage 340.
The Savage model 340 was made from 1950-1985,while the Savage model 340C,and 340S deluxe were made from 1952-1960.Yours could also be made during this time span.
Without a serial number,I can only say that the savage model 340 was made from 1950-1985.If you would include the type of sights,barrel,barrel length,and stock design It would better help me in deciding with in which years your savage model 340 was produced.
340.The Savage Arms model 340 was made between the years 1950-1985.The model 340C was made from 1952-1960.The model 340V was made in the 1960,s.
50-275 USD or so