Okay, so after reading nothing but positive reviews and actually firing the rifle I have to say I'm in love with the Savage Arms 12BVSS.  For the money I don't believe there is a better rifle for varmint shooting.  The one I actually got to fire was a 22-250 but I was wondering if maybe I should be considering the .223 version as well.  Prices for good varmint ammunition for the 22-250 run a little higher but not that much over .223 so this isn't that big of issue to me.  What are some other reasons I should consider the .223 instead?  Is the 22-250 over kill for most varmints?  Is the extra cost of ammo enough to justify a .223 instead?  Your help would be greatly appreciated.

.22-250 will give 50-100yds more range than a .223 but ammo costs will be much higher. A good .223 will reach out effectively to around 250yds, maybe 300yds.
I really like my .223 and find it plenty for the shooting I do.

I love the 223, ammo can be had as remanufactured by Black Hills and others at a great savings over new ammo.

Heat is the enemy of any firearm, 223 can run many rounds beyond the 22-250 before a melt down occurs.

22-250 has range that a 223 cannot compete with.

There have been some pretty heated threads about this subject in the past.  Do a search and read up.  
That said; I own and shoot both.  .223 is nice out to 300yds, past that, IMHO, it doesn't have enough for rock chucks or cyotes.  Will it do it? Sure, but not always cleanly.  JMHO.  Rock chucks are hardy little critters.   I also believe that the .22-250 tends to be a more accurate round in most guns.  Just another opinon, right or wrong.  

With my Rem 700classic 24" barrel and reloads, my .22-.250 will reach out to 400yds and be two inches low if zeroed at 2" high at 100yds.  Rock chucks go poof at 400yds with V-Max reloads that are just under max.  I would bet if I were a better shot, hits at 500 would be just as potent and attainable.  I agree that the .22-250 give you at least 150 yards more than the .223.  It will however heat up quickly.  If you like to shoot alot of rounds very quickly, .223 is a better choice.

Edited to add:
My AR with iron sights is perfect for a fun and good day of rock chuck hunting, but when I want to get serious, out comes the .22-250.  The AR with irons is perfect for the distance that I believe the .223 is affective out to.  Past the 300yd mark, the .22-250 really shines.  They are both going with me on vacation to our cabin!  

Another 223 proponent. [did I just say that?]
All my centerfire rifles are 223 and I like them. I must admit to not taking shots over 300 and when shooting in windy conditions, varmint bullets are a chore to dial in but you can see the hits[puffs] where a stronger cartrage may not allow you to do. You will need a spotter. Its hell when you hear a second round to realize your spotter has picked off your target! lol

Quoted: A good .223 will reach out effectively to around 250yds, maybe 300yds.

Please don't say anything to the prairie dogs that I shoot at 900+ yards with a .223.  They might stop dying.

Quoted: Quoted: A good .223 will reach out effectively to around 250yds, maybe 300yds. Please don't say anything to the prairie dogs that I shoot at 900+ yards with a .223.  They might stop dying.

That is a hell of a good shot. Any idea what the ballistics are at that range? What range do you zero at and what is the holdover?

Quoted: Quoted: Quoted: A good .223 will reach out effectively to around 250yds, maybe 300yds. Please don't say anything to the prairie dogs that I shoot at 900+ yards with a .223.  They might stop dying. That is a hell of a good shot. Any idea what the ballistics are at that range? What range do you zero at and what is the holdover?

Sure, at 1000 yards remaining velocity is just over 1100 FPS, and remaining energy just over 200 ft/lbs.  We zero at 200 yards, and at 950 yards the bullet is 335" below line of sight, so the "come up" with a 1/4 minute click scope is 135 clicks.  Mucho fun.  We keep trying for a confirmed kill at a rangefinder verified 1000+ yards, but we haven't gotten there yet.  Close, but no cigar.