Rapier, You are right on the case volume. It doesn't make much difference whether the case is short and fat or long and belted. Volume is volume. Many of the WSM calibers are about 100 fps slower than their closest stablemates. I just had a 270 WSM here in a Savage and the weight was more than a 270 Weatherby which is usually about 100 fps faster. Shooters are still going through the idea that a 6.5/284 is more acurate than a 6.5/06. A 6.5/06 built with the same care of manufacturing as a comparable 6.5/284 will shoot side-by-side with the famed 6.5/284. Just about identical volume.
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