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Shot gunning from a tank: M1028

The M1028 is a 120mm shotgun shell for the M1 tank. The shell holds 1100 10mm tungsten balls. They are apparently lethal up to 700m (765 yards). Here is a video of the shell being fired in slow motion. It shows the shot breaking the sound barrier and the shot pattern (H/T to Sebastian).

I tried to calculate the weight of each ball. It depends on how pure the balls are. My calculations, based on a company that makes tungsten balls that weigh 18 grams per cm3, indicate that each ball will weigh about 145 grains. That is a combined weight of 159,500 grains / 10 kilograms / 22.8 pounds!

(4/3) x pie x 0.5cm ^ 3 = 0.52 cm3
0.52 * 18 = 9.42 grams (145 grains)

Please correct me if I am wrong.

The requirements of the round were:

  • Defeat >50% Advancing Squad w/ 1 Shot
  • Defeat >50% Advancing Platoon w/ 2 Shots
  • 200-500M (threshold)/100-700M (objective)
  • Muzzle Action (i.e. No Fuze)
  • No orientation of the projectile
  • Vulnerability no worse than current fielded

 Pics Soldiertech M1028-1
The M1028 cross section.

Here is a before and after shot taking during the testing of the round. I am not sure of the range.

Picture 15-12
Before

Picture 16-6
Two dummies survived, the wall did not.

The concept of shot is not new. Grape shot or loose stones, metal and glass have been used for as long as cannons have.

Grapeshot Treatise Closeup
American Revolution grapeshot

Sources of information:

M1028 - GARM Final (PDF)
Military.com
PSMVCC (PDF)
JinJu Powder Metallurgy

Posted by Steve on Feb 29th 2008 | Filed in ammunition, military, photos, video | Comments (14)

SHOT Show Air Guns

B.B. has written two posts about the air guns launched at SHOT. I was going to cover the SHOT air guns, but B.B. knows a lot more about the subject than I do.

Airhawk 1504
Ruger Air Hawk

Read it here.

Posted by Steve on Feb 11th 2008 | Filed in air guns | Comments (0)

Auto-Ordnance M1 Carbine

Auto-Ordnance has a new “Tactical Folding Stock Model” M1 Carbine out later this year.

Aom160
Black polymer folding stock, metal handguard

The Auto-Ordnance M1 .30 Caliber carbine is produced in Kahr’s state-of-the-art manufacturing plant in Worcester, MA. The Auto-Ordnance carbines are produced using newly manufactured parts on high precision computerized machinery.

Markings include the following: Auto-Ordnance, Worcester, MA behind the rear sight; U.S. Carbine, Cal. 30 ML on the receiver in front of the bolt and the serial number is engraved on the left side of the receiver.

Specs:

Barrel 18″
Length 36 1/2″ overall, 27 1/2″ (Folded)
Weight 5 lbs 13 ounces
Finish Parkerized
Sight Post front sight, flip style rear sight
Stock Polymer
Magazine One 15 Shot stick
Price $792.00

Hat Tip: Cryptic Subterranean

Posted by Steve on Feb 6th 2008 | Filed in rifles | Comments (8)

AR Rainbow

Billet uppers and lowers at SHOT Show.

Shot2008102
(Photo by TalonArms)

Posted by Steve on Feb 6th 2008 | Filed in rifles | Comments (1)

Lapua X-ACT: New Accurate .22 Ammo

This new ammo from Lapua is going to be the most expensive .22 LR ammo when it is released, and apparently the most accurate.

Lapua rolled out a whole new line-up of rimfire competition ammo in three grades, X-ACT, Midus Plus, and Center-X. The ultra-premium X-ACT ammunition, which may be the most expensive rimfire ammo ever produced, is designed to out-shoot the best Eley has to offer.

More info at 6mmbr.com

UPDATE

According to Mooseyard @ RFC

The rep from Lapua at the SHOT show expected pricing to be 20-25% higher than anything else out there. He also said that the people testing the ammo (real compitition shooters) have been seeing group reduction of 30-50%. That’s impressive if true.

Posted by Steve on Feb 4th 2008 | Filed in rifles, rimfire | Comments (0)

GunPunit coverage of SHOT Show

Links to the GunPundit SHOT Show 2008 coverage.

Taurus 5mm Rem. Mag. Tracker Revolver

Arsenal Milled AK

TDI KRISS

SIG 556 SWAT

5mm Remington Rimfire Magnum

Wilson Combat CQB Elite 1911

Posted by Steve on Feb 4th 2008 | Filed in handguns, rifles | Comments (2)