I'm not sure he has that much overlap. Just looking at the chamberings, sure it looks that way. But some of them could have very different performance envelopes. Suppose the .223 is a light sporter ideal for a walkabout hunt, and the .222 is a heavy barreled Sako capable of .3 MOA group from a bench? Those would have very different uses for a Virgina groundhog hunter. Again, if the .243 is a Remington Model 7 and the 6mm is a Ruger #1, I see distinct roles.
I have 5 rifles in .284, but they are a NULA 7-08, a 7x57 in a maple Mannlicher stock, a high end custom .280 Rem, an all around 7mm Rem Mag, and a heavy barreled 7mm Rem mag set up like a Remington 40x. All very different.
So overlap cannot be assessed on cartridge alone. That's my story, and I am sticking to it.
