Very shortly after standardization of the 6.5mm Creedmoor, John Snow suggested and George Gardner helped develop this necked-down, 6mm, version. This round has the chamber-quality advantages of the parent round and sufficient capacity to offer serious 6mm performance. Owing to the dimensional uniformity advantages, the 6mm Creedmoor has accuracy and case-life advantages, when compared to any other standardized 6mm cartridge with the possible exception of the 6mm ARC. Owing to the latter characteristic, this round is a superior choice for those interested in a low-recoil deer and long-range varmint-hunting combination. As with the 6.5 Creedmoor, it would be easy to be cynical about the introduction of a new chambering, viewing it as nothing more than an effort by a gun-maker to increase sales, without doing anything to improve the state of the art for target shooters and hunters. Precisely that has been going on for more than 150 years — not every new chambering ever offered was redundant but the majority were. The good news is, as noted, the 6mm ARC does offer something better. Heritage of this case dates to the 1870s with the introduction of the 40-70 Ballard case.