Sicero
Here's a link on the 6mmAR website...
it's lineage is a 762x39...to a PPC...to a 6.5 Grendel...necked down to a
6mm Grendel (6mmAR). It really is a great 6mm cartridge and CZs are a perfect match to build one on...The Grendel/762 CZ magazines feed the cartridge very well.
I am just not up on barrel work after they are chambered...hear it can affect the accuracy, but I have no experience in this...Fluting would be what I would like to do to lower weight, but don't know what end product achives in stress on the barrel....Others know more on this than I.
I just have enough experience with cartridges on these two boltfaces and their potential and actual performance to recommend the 6mmAR and the 221 FB...as options that would make the most demanding Cartridge Sleuth
Smile when shooting them.!!!! At least that would be my feelings...
Bill
http://www.6mmar.com/6mm_AR_Loading_Info.html