06-26-2011, 02:25 AM
stanc Wrote:By 6.5 and 7.0mm, do you mean .264" and .284", or .257" and .277" bullet diameters? It appears to me that it's the latter, which would mean that what we refer to as 6.5mm (as in 6.5 Grendel) wasn't even part of the test.
This seems to be corroborated by Gary Roberts, who wrote: "...the ARDEC caliber study that conclusively proves the superiority of .277" projectiles compared to smaller calibers..."
I mean .257 and .277 bore diameters, .264 and .284 bullet diameters.
I suspect that Gary Roberts was just following the military convention of giving calibres as bore diameters.
