I respectfully disagree that the ammo is no longer available. Get on the web and look it up, and see for yourself. I won't argue the "hypotheticals" of what caliber is better than another, but I have personally seen this ammo for sale in quite a few gunshops. I got blasted by other shooters for stocking up on .350 Rem. Mag. for my Model 660, but when you couldn't find it, I had plenty. It's a moot point now, but I you want the .307 then snag it and start buying and stocking up on either loaded ammo, brass, or both. Many rifles have better performance in the field than they do on paper. I have found that those who get wrapped around the axle on paper ballistic charts usually have very little field experience actually hunting.