Do I have a 340 or????

Ok so here's the deal. I have an old Western Field model 712 in 222. I've been thinking about restocking it because there's a nice crack in the existing one. I've been researching who made my gun and I've found that Savage made guns for Western Field. A while back I was posting my load development for this gun on a different forum and a guy had posted a nice write-up of the 340's which he said is what I had. Now that I've done some more reading I've found that it is an 840? Anyone have some info on the Savage 340's and 840's and their difference's? I know some people might say I'm wasting my time on this gun but it was my grandpa's so it has sentimental value. The serial number is 218077. Thanks in advance

Don't mind the mess, I also have a Tru Line Jr torn apart that I'm restoring

http://i36.photobucket.com/albums/e4...ps1wsfgiic.jpg

http://i36.photobucket.com/albums/e4...psd2f97hj6.jpg

http://i36.photobucket.com/albums/e4...psngvyrprm.jpg

http://i36.photobucket.com/albums/e4...psy5lw06ad.jpg

http://i36.photobucket.com/albums/e4...psk1ot2fpz.jpg

Don't think there's a whole lot of difference between a 340 and an 840. If that's the crack in the picture, just glue it and clamp it. Elmers contractor glue works great, and any run over can be cleaned off the stock, no need to refinish or re-stock! Other than a small crack, it's in good shape, looks good!

Here is a picture of the crack, it runs from the bolt handle to the front screw

http://i36.photobucket.com/albums/e4...ps7ltjtyoe.jpg

That's an easy fix, just glue and clamp. 222 is not a big kicker so I wouldn't worry about it. May want to bed the recoil lug area.