There is some truth to both of the above arguments. Some cartridge types (look at Benchrest records) have proven themselves to be what is called inherently more accurate than others. But the truth of the matter is those are measured in fractions of inches that will only matter in bench rest matches. Rest assured that expensive " Benchrest Rifles" have been chambered in calibers other than those that set all the records. The reason those rifles are built in those cartridges is because they have a proven track record of being more inherently accurate.

The difference is insignificant when you start to talk about hunting rifles fired from field positions. I am NOT saying that I won' t take more accuracy rather than less. What I am saying is that the difference in inherent accuracy in any of the short magnums is probably not worth worrying about in the field. And something that wasn' t even mentioned yet is that by designing ultrashort-sharp shouldered cartridges (functions that usually help inherent accuracy) are cartridge features that normally make functioning harder to insure. Look at how cartridges intended for use on dangerous game are intentionally designed. Most have more gently tapered cases and shoulders meaning fewer " sharp" edges when feeding from magazines. Making the transition from magazine to chamber both smoother and more certain. (I know you can find exceptions to both of the above.) But exceptions are just that....exceptions. Also one other consideration that may or may not be relevant to some. Short fat cartridges designs usually lose magazine capacity of one or two cartridges to cartridges of more standard design. Just like magnum cartridges usually have reduced magazine capacity as well. Not important to some....but more important to others. A good example is I own a .350 Remington Magnum in a Md 673 Remington. The cartridge capacity is three cartridges in the magazine and one in the chamber. A .35 Whelen (which equals the .350 Mag ballistically) will hold four cartridges in that same magazine design. Not important to a deer or elk hunter....but it might be for some one in brown bear country!

There have been cartridge designs that have been proven more inherently accurate. But unless you are getting into " Benchrest Target shooting" I wouldn' t let it concern my decisions....especially when buying a hunting rifle!