I'm interested in a Browning A-Bolt ($800)or Winchester Model 70 ($685) in .243which will be used primarily for deer hunting.I have no idea about choosing a .243, vs. a .243WSM vs. a .243 WSSM, can you enlighten me? I'm leaning towards the .243 WSSM, for no apparent reason besides newfound popularity. What are the ammo price differences?

It'll be Composite w/ a Stainless Steel barrel and I'll be mounting a nice (Leupold or Zeiss)3-9x40 on it. These are the two I'm considering:

http://www.walmart.com/catalog/product.do?product_id=2685129

http://www.walmart.com/catalog/product.do?product_id=2685291