Popular Ammo>40 Cal Ammo

40 Cal Ammo for Sale - Buy 40 Cal Ammunition Online

40 cal ammo is for sale every day at GunBroker.com. You can buy this type of ammunition made by manufacturers such as Remington and Hornady through one of the many sellers listing their products here at GunBroker.com, the world's largest gun auction site.

Getting to know 40 cal ammo

.40 caliber ammo features rimless, straight cartridges, which were originally developed at the behest of the FBI, which aimed to replace agents’ standard-issue revolvers with semiautomatic pistols in order to increase ammo capacity and reduce reloading times in the field.

The FBI specifically requested that Smith and Wesson produce a new handgun based on the existing Model 4506 .45 that could function with 10mm ammunition. By reducing powder in existing 10mm ammunition, thus providing more airspace in the case, S&W realized it could produce ballistics to match the FBI’s specifications. S&W then teamed with Winchester to produce the new cartridge, the .40 S&W.

40 cal ammo debuted in January 1990, but it was actually Glock that had the first commercially available pistols chambered to fit the new cartridges.

40 cal ammo specifications

The biggest difference between the 40 cal ammo cartridge and its parent case, the 10mm Auto, is the 40 cal ammo’s use of a small pistol primer and shortened length. The neck and shoulder diameter of .40 cal ammo cartridges is .423 inches. The base and rim come in at .424 inches with a thickness of .055 inches. The case is .850 inches of the overall length, 1.135 inches. The rifling twist is 1 in 16 inches.

Get your 40 cal ammo today

40 cal ammo is ideal for self-defense and is popular with law enforcement in the US, Canada and Australia. GunBroker.com sellers update their auction listings frequently, so if you're looking to buy 40 cal or other pistol ammo, check back often.

40 For Sale


There are 4376 items that match your criteria.
Item   Title      Click Headers to Sort Quantity Bids Price Time Left
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200 $34.99 52d 23h +
682388657
 
 
 
50 $400.00 50d 13h +
681976034
 
 
 
10 $299.99 49d 14h +
674266644
 
 
 
50 $145.00 31d 21h +
698730283
 
 
 
 
10 $44.00 27d 17h +
670051817
 
 
 
 
10 $217.91 22d 16h +
696346657
 
 
 
20 $24.99 22d 15h +
695853416
 
 
 
 
10 $38.00 21d 12h +
697995781
 
 
 
 
70 $165.00 20d 20h +
682011889
 
 
 
 
10 $275.00 19d 15h +
693580993
 
 
 
10 $40.00 16d 1h +
698327461
 
 
 
50 $58.50 15d 20h +
666740962
 
 
 
 
20 $28.99 15d 10h +
699796393
 
 
 
 
10 $99.99 13d 23h +
699673831
 
 
 
 
10 $49.99 13d 23h +
699789866
 
 
 
 
10 $79.99 13d 23h +
699801860
 
 
 
 
10 $109.99 13d 23h +
699647990
 
 
 
 
10 $69.99 13d 17h +
699199579
 
 
11 $0.01 12d 18h +
692020404
 
 
 
100 $325.00 12d 14h +
698935584
 
 
 
 
16 $42.00 12d 1h +
698779239
 
 
10 $80.00 11d 19h +
664937728
 
 
 
10 $40.00 11d 17h +
691691435
 
 
 
100 $55.00 11d 16h +
698488008
 
 
 
 
10 $149.99 11d 1h +
698485387
 
 
 
 
10 $59.99 11d 1h +
698483929
 
 
 
 
10 $139.99 11d 1h +
698483583
 
 
 
 
10 $74.99 11d 1h +
698482604
 
 
 
 
10 $59.99 11d 1h +
698482038
 
 
 
 
10 $149.99 11d 1h +
698493019
 
 
 
 
10 $89.99 11d +
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10 $129.99 11d +
698476508
 
 
 
 
10 $54.99 11d +
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10 $59.99 11d +
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10 $169.99 11d +
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10 $74.99 11d +
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10 $49.99 11d +
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10 $109.99 11d +
698444265
 
 
 
 
10 $139.99 11d +
698443757
 
 
 
 
10 $54.99 11d +
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10 $64.99 11d +
698441494
 
 
 
 
10 $89.99 10d 23h +
698429851
 
 
 
 
10 $74.99 10d 23h +
698427247
 
 
 
 
10 $99.99 10d 23h +
698425678
 
 
 
 
10 $134.99 10d 23h +
698488820
 
 
 
 
10 $49.99 10d 23h +
696776977
 
 
 
60 $96.50 10d 16h +
698297398
 
 
 
15 $87.00 9d 22h +
699669148
 
 
10 $115.00 9d 18h +
697496224
 
 
 
 
10 $59.99 9d 1h +
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Updated: 9/22/2017 9:49:15 PM EST   Check GunBroker.com official time

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