6.5-06 A-Square

6.5-06 A-Square
Type Centerfire rifle
Place of origin  United States
Production history
Designer A-Square
Designed 1997
Specifications
Parent case .30-06 Springfield
Case type Rimless, bottleneck
Bullet diameter .264 in (6.7 mm)
Neck diameter .296 in (7.5 mm)
Shoulder diameter .4425 in (11.24 mm)
Base diameter .4698 in (11.93 mm)
Rim diameter .473 in (12.0 mm)
Rim thickness .034 in (0.86 mm)
Case length 2.494 in (63.3 mm)
Overall length 3.44 in (87 mm)
Rifling twist 1-9"[1]
Primer type Large rifle
Maximum pressure 60,200 psi (415 MPa)
Ballistic performance
Bullet weight/type Velocity Energy
100 gr (6 g) Nosler Ballistic Tip 3,400 ft/s (1,000 m/s) 2,566 ft·lbf (3,479 J)
140 gr (9 g) Nosler Partition 3,000 ft/s (910 m/s) 2,797 ft·lbf (3,792 J)
Source(s): A-Square Co.

The 6.5-06 A-Square is a centerfire rifle cartridge that originated as a wildcat, based on the popular .30-06 Springfield. A-Square standardized the dimensions of the cartridge and submitted them to SAAMI in 1997.

Design

The 6.5-06 A-Square uses a .264" diameter bullet loaded into a modified .30-06 Springfield cartridge. The neck is reduced to accept the smaller bullet, the shoulder is longer than that of the parent cartridge, and it has a 17.5 degree shoulder angle leading to the neck of the case, where the bullet is seated.[2]

Uses

The 6.5-06 A-Square has power similar to that of the .270 Winchester and .308 Winchester, making it suitable for hunting medium-sized game such as deer and black bear. It is also used in competitions such as F-Class and Benchrest formats.

Availability of ammunition

Currently (2011) none of the major commercial ammunition manufacturers offer factory loaded 6.5-06 A-Square ammunition. There are smaller companies that custom load the cartridge[3] however, and hand-loading can be accomplished using the proper set of dies and using .25-06 Remington, .270 Winchester, or .30-06 Springfield brass and making the proper modifications to fit the 6.5-06 A-Square chamber. After firing, the brass from the original cartridge (.25-06 Remington, .270 Winchester, or .30-06 Springfield) will be fire-formed to the exact dimensions of the 6.5-06 A-Square chamber.

Firearms chambered for 6.5-06 A-Square

A-Square currently (2011) lists two different rifles factory chambered in 6.5-06 A-Square; the Hamilcar and the Genghis Khan.[4] Several of the major custom barrel manufacturers offer the 6.5-06 A-Square (sometimes listed simply as 6.5-06) chamber as an option for builders of custom rifles.

See also

References

  1. ↑ http://www.saami.org/PubResources/CC_Drawings/Rifle/6_5-06%20A-Square.pdf
  2. ↑ http://www.saami.org/PubResources/CC_Drawings/Rifle/6_5-06%20A-Square.pdf
  3. ↑ http://www.cpcartridge.com/cpcart/index.php?main_page=index&cPath=2_112
  4. ↑ http://a-squareco.com/Rifles.html
This article is issued from Wikipedia - version of the Wednesday, December 30, 2015. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.