Years ago the 222 Remington was the "thing" in Australia anyway. I think many of these "new" calibers etc are fads. I target shooting tomorrow using my 300 Winchester magnum and checking out where my Woodleigh 400 grain hydros are printing. U might add I'm using a borrowed lead sled for the 416. I used a 222 and 243 for competition shooting many years ago. I must admit that the 243 took a mighty lot of fine tuning with multiple powders, bullets, and primers. Finnicky critter! These days I don't have a 222 or 243 - the former given to my son and the latter to a step son.Stumbling around into all these old threads I decided a why not thread is in order. Lets compare the three Cartridges. Specify Necked down 7mm Rem Mag Brass for the .264 against the PRC and SAUM of the same Caliber. Who's got the skinny? ( I don't have any PRC or SAUM Brass anyway )
I looked at the 6.5 Creedmoor but decided that I'll use my Kimber M84 in 308 topped with a Nighforce scope for target shooting (I shoot mainly at 400 m not yards).
Personally I think it's the shooter who needs the "fine tuning" rather than the cartridge etc.