Canadian Lefty,

Aside from the microscopic loony examination of every tiny difference in various cartridges, why keep obsessing after more than a decade? Today there's a 6.5mm rifle cartridge for any obsession, whether tiny or huge, belted or beltless or rebated. Why not just pick one and be done with it?

“Montana seems to me to be what a small boy would think Texas is like from hearing Texans.”
John Steinbeck