From Wikipedia, the free encyclopedia
US centerfire rifle cartridge
6.5-06 A-Square
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Type
| Centerfire rifle
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Place of origin
| United States
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Designer
| A-Square
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Designed
| 1997
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Parent case
| .30-06 Springfield
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Case type
| Rimless, bottleneck
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Bullet diameter
| .264 in (6.7 mm)
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Neck diameter
| .296 in (7.5 mm)
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Shoulder diameter
| .4425 in (11.24 mm)
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Base diameter
| .4698 in (11.93 mm)
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Rim diameter
| .473 in (12.0 mm)
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Rim thickness
| .034 in (0.86 mm)
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Case length
| 2.494 in (63.3 mm)
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Overall length
| 3.44 in (87 mm)
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Case capacity
| 65.7 gr H2O
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Rifling twist
| 1-9"
[1]
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Primer type
| Large rifle
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Maximum pressure
| 60,200 psi (415 MPa)
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Bullet mass/type
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Velocity
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Energy
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100 gr (6 g) Nosler Ballistic Tip
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3,400 ft/s (1,000 m/s)
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2,566 ft?lbf (3,479 J)
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140 gr (9 g) Nosler Partition
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3,000 ft/s (910 m/s)
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2,797 ft?lbf (3,792 J)
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Source(s):
A-Square Co.
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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
[
edit
]
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
[
edit
]
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
[
edit
]
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
[
edit
]
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
[
edit
]
References
[
edit
]
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Prototype
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First generation
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Second generation
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Third generation
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Fourth generation
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Fifth generation
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Sixth generation
| Based on .243 Winchester
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Based on .307 Winchester
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Based on .308×1.5-inch Barnes
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Seventh generation
| Based on 6mm BR
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Based on .22 BR
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Eighth generation
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Related
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