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10/20/2017 1:01:18 AM
9/22/2017 12:11:25 AM
Posted: 8/5/2005 9:16:54 AM EDT
Okay what is the difference between the M993 and the M61 armor peircing rounds.
I am aware the M993 is a 126 grain bullet while the M61 is a 150 grian bullet, but is one more effective than the other? Which weapons were each designed for? I imagine the M61 is better suited for the M14 type rifle due to the 1-11 twist but where does the M993 step into action. Any info would be great. Thanks.
Link Posted: 8/6/2005 1:39:50 AM EDT
Cartridge, 7.62mm AP, M993 and the Cartridge, 5.56mm AP, M995 are similar in design. Both cartridges employ a tungsten core within a jacketed bullet envelope. The projectiles are crimped onto a brass cartridge case with a standard propellant charge. The shaped tungsten core provides enhanced armor penetration over the standard issue cartridges.

The M993 7.62mm AP round enhances the performance of the M60 and M240 7.62mm machine guns and the M24 Sniper Weapon System over the M80 Ball by effectively increasing the engagement ranges against lightly armored targets.

Ballistic data for 7.62mm ammunition. Model Cartridge Weight Cartridge Length Propellant Projectile Weight Chamber Pressure Muzzle Velocity
78 ft (23.8 m) from muzzle
M59 Ball 393 gr (25.47 gm) 2.8 in (71.1 mm) WC 846 150.5 gr (9.75 gm) 50,000 psi (3,515 kg/cm²) 2,750 fps (838 mps)
M60 HPT 412 gr (26.7 gm) 2.8 in (71.1 mm) IMR 4475 171.5 gr (11.11 gm) 67,500 psi (4,745 kg/cm²) N/A
M61 AP 393 gr (25.47 gm) 2.8 in (71.1 mm) IMR 4475 150.5 gr (9.75 gm) 50,000 psi (3,515 kg/cm²) 2,750 fps (838 mps)
M62 Tracer 383 gr (24.81 gm) 2.8 in (71.1 mm) WC 846 142 gr (9.2 gm) 50,000 psi (3,515 kg/cm²) 2,750 fps (838 mps)
M62 Tracer OFM 387 gr (25.08 gm) 2.8 in (71.1 mm) WC 846 146 gr (9.46 gm) 50,000 psi (3,515 kg/cm²) 2,750 fps (838 mps)
M63 Dummy 258 gr (16.72 gm) 2.8 in (71.1 mm) N/A ? N/A N/A
M64 Grenade 295 gr (19.12 gm) 2 in (50.8 mm) WC 830 N/A N/A 160 fps (49 mps) 5.5 ft (1.7 m) from muzzle, projected grenade
M80 Ball 392 gr (25.4 gm) 2.8 in (71.1 mm) WC 846 146 gr (9.46 gm) 50,000 psi (3,515 kg/cm²) 2,750 fps (838 mps)
M82 Blank 235 gr (15.23 gm) 2.6 in (66.04 mm) SR 8231 N/A N/A N/A
M118 Special Ball 390 gr (25.27 gm) 2.83 in (71.88 mm) WC 846 or IMR 4895 172 gr (11.15 gm) 50,000 psi (3,515 kg/cm²) 2,640 fps (805 mps)
M160 Frangible 315 gr (20.41 gm) 2.8 in (71.1 mm) SR 8074 108.5 gr (7.03 gm) N/A 1,320 fps (402 mps) 100 yd (91 m) from muzzle
M172 Dummy 385 gr (24.95 gm) 2.8 in (71.1 mm) N/A ? N/A N/A
M276 Dim Tracer 381 gr (24.69 gm) 2.8 in (71.1 mm) WC 846 140-150 gr (9.07-9.72 gm) 50,000 psi (3,515 kg/cm²) 2,750 fps (838 mps) GMCS
2,680 fps (817 mps) GM
M852 Match 385 gr (24.95 gm) 2.83 in (71.88 mm) IMR 4895 168 gr (10.89 gm) Hollow point 50,000 psi (3,515 kg/cm²) 2,550 fps (777 mps)
M993 AP 362.6 gr (23.5 gm) 2.8 in (71.1 mm) Bofors NC1290 126.6 gr (8.2 gm) 55,115 psi (3,875 kg/cm²) 2,985 fps (910 mps)

M61


Used by M60, M219, and M240 machine guns, and the M14 rifle. The cartridge is used in rifles and machine guns against personnel and light armored or unarmored targets, concrete shelters, and similar bullet-resisting targets.

Armor Penetration.
300 meters: 0.28 in (7 mm)
500 meters: 0.2 in (5 mm)

The cartridge is identified by a black bullet tip.

This ammunition is not authorized for training purposes.

Type Classification: OBS - MSR 11756003


Cartridge, 7.62mm, Armor Piercing, M993


Used by M60 and M240 machine guns, and the M24 Sniper Weapon System. Intended for use against current and future light armored targets. The M993 offers the capability to defeat these targets at ranges 2 to 3 times that of previous AP ammunition.

The projectile assembly consists of a tungsten core penetrator contained in an aluminum cup and jacketed by tombac (similar to standard gilding metal, 90% copper, 10% zinc) clad steel. The shaped tungsten core provides enhanced armor penetration, representing a key departure from the current 7.62mm ball service round. The Bofors CGAB produced cartridge utilizes a conventional brass cartridge case with a Berdan primer. The propellant is a single base type manufactured by Bofors and the primer is manufactured by Dynamit Noble.

The M993 7.62mm AP Round is capable of penetrating a 7mm thick high hardness armor (HHA) plate at a distance of 500 meters from the muzzle of the weapon. This corresponds to 1/4" armor plate at a distance of 550m.

Type Classification Date: 16 FEB 1996. Unit cost: $2.61 (Fiscal Year 2005).

http://www.inetres.com/gp/military/infantry/rifle/762mm_ammo.html

CD
Got couple of belts of the M993 for the MG3 next to me.
Link Posted: 8/6/2005 6:22:41 AM EDT
Thanks for the reply. This helped a lot. Medic17
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