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) | |||||||||||
| Case capacity | 65.7 gr H2O | |||||||||||
| Rifling twist | 1-9"[1] | |||||||||||
| Primer type | Large rifle | |||||||||||
| Maximum pressure | 60,200 psi (415 MPa) | |||||||||||
| Ballistic performance | ||||||||||||
| ||||||||||||
| 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.[1] The Ackley Improved version of the cartridge uses a sharper shoulder angle and has a case capacity of 72 gr of water.
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[2] 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
As of 2011, A-Square listed two different rifles factory chambered in 6.5-06 A-Square; the Hamilcar and the Genghis Khan.[3] 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. However, On 15 February 2012, the A-Square Company ceased to exist.[citation needed]
See also
References
- ^ a b "MAXIMUM CARTRIDGE / MINIMUM CHAMBER" (PDF). Archived from the original (PDF) on 2011-07-26. Retrieved 2011-04-19.
- ^ cpcartridge index[dead link]
- ^ "Rifles". Archived from the original on 2010-08-21. Retrieved 2011-04-19.