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The 6mm ARC is a medium-power cartridge comparable to the [[6.5mm Grendel]], but with better ballistics thanks to the greater muzzle velocity achieved by using lighter 6 mm bullets and enough power to make use of the heavy 6 mm bullets. Some have stated that it offers comparable ballistics to larger 6 mm cartridges like the 6mm Creedmoor and [[.243 Winchester]], but out of a smaller cartridge, however this simply is not true when comparing muzzle velocities between them.<ref>{{cite web|url=https://www.loaddevelopment.com/6mm-creedmoor-hunt-and-competition/|title=6mm ARC vs 6mm Creedmoor|website=loaddevelopment.com}}</ref> What the 6mm ARC does offer though is almost comparable velocities and ballistic performance, but out of a compact cartridge that has lessened perceived recoil and fits into the standard [[AR-15]] length actions.
In addition to the above comments there is some confusion regarding the 6 mm ARC's performance. This is because loading data given in some manuals such as the ''11th Edition Hornady Reloading Manual''<ref>[https://www.hornady.com/reloading/handbook Hornady 11th Edition Reloading Manual]</ref> ,for example, has two sets of data. The first set of data is loaded to the SAAMI maximum average pressure (MAP) of 52,000 psi, which is stated to be suitable for gas-operated firearms such as the AR-15 platform and its derivatives. The second set of data is loaded to a MAP of
For example, the data in the Hornady 11th Edition Manual for an 18 in (457 mm)-barrelled AR-15 platform firearm was on average 200-300 ft/s (60-90 m/s) less than the data for the 24 in (610 mm)-barrelled CZ 527 bolt action rifle.
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