Fall predator season is when the heavy .224 debate gets loudest, and this year the argument has two clear sides: the 22 ARC and the 22 Creedmoor. Both share a bullet diameter, a 30-degree shoulder, and the same design philosophy that produced the 6mm ARC and the 6.5 PRC — efficient cases built around long, high-ballistic-coefficient bullets. Beyond that, they were engineered for different rifles and different jobs, and choosing wrong costs you either money or performance you will never get back.
The 22 ARC traces its lineage to the 6.5 Grendel and 6mm ARC family. It keeps the .441-inch case head and a 1.525-inch case length, which allows a maximum overall length of 2.260 inches — the number that matters, because it means the round feeds from a standard AR-15 magazine. Case capacity is about 34.6 grains of water, SAAMI maximum pressure is a mild 52,000 psi to protect gas-gun bolt lugs, and the specified 1:7-inch twist stabilizes the longest .224 bullets on the shelf. Petersen’s Hunting lays out the full spec sheet and how it stacks up against the .22-250.
The 22 Creedmoor is simpler to explain: a 6.5 Creedmoor case necked down to .224. That gives it roughly 52.6 grains of water of capacity, a 2.700-inch maximum overall length, a 1:8 twist as the SAAMI standard, and about 50 percent more room for powder than the ARC. It needs a short-action bolt rifle or an AR-10 sized platform, which is exactly why it exists.
Hornady publishes three factory 22 ARC loads from a 24-inch test barrel: a 62-grain ELD-VT V-Match at 3,300 fps, a 75-grain ELD-Match at 3,075 fps, and an 88-grain ELD-Match at 2,820 fps. Loaded with the same class of bullet, the Creedmoor runs about 275 fps faster at the muzzle: its 80-grain ELD-X factory load is rated at 3,285 fps and roughly 1,917 ft-lbs, against 3,010 fps and 1,609 ft-lbs for the ARC. In real rifles the gap narrows. Outdoor Life’s multi-rifle test logged 2,953 fps for a 22 ARC and 3,159 fps for a 22 Creedmoor, both with the 80-grain ELD-X from barrels between 18 and 22 inches.
Using those two measured loads, the difference at distance is real but modest. At 500 yards in a 10 mph crosswind, the 22 ARC drops about 44 inches and drifts about 17 inches, while the 22 Creedmoor drops roughly 37 inches and drifts 15. At 1,000 yards the spread widens to about 301 inches of drop for the ARC against 253 for the Creedmoor. Outdoor Life notes that the wind calls at 1,000 yards differ by roughly 0.3 MIL — less than the average shooter’s wind-reading error, and well past the range most hunters should be shooting at game anyway.
Where the ARC punches above its class is with the light, high-BC bullets. Its 62-grain ELD-VT shoots flatter than a .22-250 past 600 yards, which is the whole point of the design: give up raw muzzle speed in exchange for aerodynamic efficiency in a package that fits an AR-15.
The Creedmoor’s velocity is bought with powder — roughly 30 percent more per shot for the same bullet. More powder means more heat, faster throat erosion, and more money in every handload and every barrel replacement. The author of that 3,000-round test also reported a pattern worth remembering: the most consistent accuracy in both cartridges showed up below 3,200 fps, and the 22 ARC was the easier of the two to tune. Chasing the last 150 fps tends to buy you dispersion rather than precision.
One more structural point favors the ARC for reloaders. All factory 22 ARC ammunition is held to 52,000 psi for the AR-15, but a bolt-action rifle chambered in 22 ARC can run the separate 60,000 to 62,000 psi data Hornady publishes for it. That closes much of the velocity gap while keeping the smaller appetite for powder.
Match the cartridge to the rifle you will actually shoot, not to a ballistics chart:
Two practical notes before you order. First, check factory ammunition availability for whichever chambering you choose — both are still young, and a cartridge you cannot feed is a paperweight, no matter how good its numbers look. Second, twist rate is not optional: the ARC wants 1:7 and the Creedmoor 1:8 to stabilize the 80-grain and heavier bullets that make either round worth owning. A slow-twist barrel turns both of them into expensive .22-250s.
For buyers weighing the two against legacy varmint rounds, the useful test is simple: decide what platform you are feeding and how many rounds a year you will pull the trigger on. The 22 ARC rewards volume and the AR-15. The 22 Creedmoor rewards reach. Neither is a mistake — buying the wrong one for your shooting is.