<br>Quoting from Lynman's guide to: Big Game Cartridges & rifles
<br>
<br>"The 340 Weatherby is a step up in performance over the .338 Winchester. It has a velocity improvement of 150 fps over the 338."
<br>
<br>However, the ammo is a lot more expensive, harder to find and it has more recoil.
<br>
<br>The .338 can generally do just as good of a job as the .340 weatherby.
<br>



[Linked Image from ]