AR HUNTING CHAMBERS


Cartridges are effective when used within their intended physical limits. If you ask too much from a cartridge it will fail. What we have provided below is a general guide to success. One must keep in mind, shot placement, bullet design, and terminal velocity are all of vital importance when considering the success or failure of a given cartridge.



450 BM


Bullet diameter: 452”
Uses: Hogs, Bears, Deer, Elk, Bison and Moose (with appropriate loads)
Effective Range: 0-250 yds.
Advantages: Hits hard for use on large game. Satisfies the straight wall cartridge requirements in multiple states allowing for use in areas not previously open to rifle hunting.
Disadvantages: Heavy, slow-moving round when measured by rifle standards. Trajectory and energy fall off quickly beyond 250 yds. As with most cartridges, the 450 BM was around as a wildcat long before it was officially adopted by SAAMI in 2008. The result of a joint project between Bushmaster and Hornady.

300 Blackout


Bullet diameter: 308”
Uses: Small to medium size (hogs or bears) and deer.
Effective Range: 0-100 yds.
Advantages: Low recoil makes this cartridge a good up-close hunting round suitable for young hunters.
Disadvantages: Limited velocity and subsequent low energy beyond 100yds keeps this cartridge on the low end of acceptable for anything but close-range hunting. History: The 300 Blackout has been around for a long time under the wildcat name of 300 Whisper. It was submitted to SAAMI and approved for general use in 2011.

6.8 SPC II


Bullet diameter: .277”
Uses: Coyotes, hogs, deer, and elk
Effective Range: 0-400 yds./coyotes, 0-300 yds./elk
Advantages: Delivers a wallop to hogs and tough critters. Ammunition is readily available from multiple sources and high quality. The 6.8 does not have the range of the 6.5 Grendel but bullet performance from the premium manufactures makes it a force to be reckoned with at lesser distances.
Disadvantages: Case is too long to allow for high B.C. bullets which means this round is limited to shorter ranges than similar cartridges. Ammunition is only available in the most popular configurations. However, this is easily overcome by hand loading.
History: 6.8 SPC was officially designed in 2003 by Remington. The 6.8 SPC II, which we use today followed some years later after being perfected by wildcatters.


6.8 SPC

6.5 Grendel (LBC)


Bullet diameter: .264”
Uses: Coyotes, hogs, deer, and elk
Effective Range: 0-600 yds./coyotes, 0-400 yds./elk
Advantages: Packs a whole lot of punch from an AR15 platform. Ammunition is readily available from multiple sources and high quality. The 6.5 Grendel has the advantage over similar cartridges in that the case is of sufficient size to allow generous amounts of powder and at the same time short enough to allow long, high B.C. (Ballistic Coefficient) bullets to be seated at magazine length.
Disadvantages: Ammunition is only available in the most popular configurations. However, this is easily overcome by hand loading.
History: 6.5 Grendel was officially designed in 2003, however, it was long in existence prior to that as various benchrest community wildcats.

22 Nosler


Bullet diameter: .224”
Uses: Varmints, predators, and small deer
Effective Range: 0-600 yds./varmints, predators, 0-200 yds./small deer
Advantages: The 22 Nosler is new to the market and has not yet really found its home. Its claim to fame is its blazing speed from an AR platform. It will serve well as both a hunting and a long-range competition round.
Disadvantages: Ammunition is available only from Nosler at this time.
History: Released to the public January 2017 by Nosler. Its intended use is long-range varmint hunting.

224 Valkyrie


Bullet diameter: .224”
Uses: Varmints, predators, and small deer
Effective Range: 0-600 yds./varmints, predators, 0-200 yds./small deer
Advantages: Like other new AR rounds the 224 Valkyrie is new to the market and has not yet really found a home. Its claim to fame is heavy for caliber bullets staying supersonic out to extended ranges. It will serve well as both a hunting and a long-range competition round.
Disadvantages: Ammunition selection is small.
History: Released to the public January 2018 by Federal. Its intended use is long-range target but given the right ammo may find a place in hunting too.


224 Valkyrie

223 Remington (Wylde)


Bullet diameter: 224”
Uses: Varmints, predators, and up to small deer
Effective Range: 0-600 yds./varmints, predators, 0-200 yds./small deer
Advantages: The 223 Remington is the most popular round of modern times with more rounds sold than any other round. Low recoil and readily available ammunition at reasonable prices makes this the choice of many.
Disadvantages: The popularity of this round lends itself to overproduction of ammunition at the expense of quality. The 223 buyer should not expect top performance from bottom priced ammo.
History: Designed in 1962 by Remington Arms. Its intended market was military small arms.

204 Ruger


Bullet diameter: .204”
Uses: Varmints and predators up to coyote size game.
Effective Range: 0-600 yds.
Advantages: The 204 Ruger is an exceptionally flat shooting cartridge which makes it a good selection for longer shots at unknown distances. Bullets are lightweight and fragile which make them a safer choice when shooting around hunting dogs, farm animals or in areas where neighboring houses are a concern.
Disadvantages: The light bullets limit game size to coyote size game and smaller.
History: Designed in 2004 by a joint venture between Ruger and Hornady. Its intended market is Varmints.


For additional or more detailed information about a particular cartridge please pick up a reloading manual or visit one of the major ammunition manufacturers websites such as: Federal, Hornady, Nosler, Winchester, Remington etc.



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