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Reply Hangar 1: Infantry Weapons/ Armor- And Attachment weapons
8mm x 25mm AUTO

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Suicidesoldier#1
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Fanatical Zealot

PostPosted: Wed Jun 16, 2010 12:59 am


8 x 25mm Auto


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Case type Rimless, straight

Bullet diameter 8.12mm
Neck diameter 8.5mm
Base diameter 10.02mm
Rim diameter 10.2mm
Rim thickness 1.40 mm (0.055 in)
Case length 31.20 mm (0.992 in)
Overall length 43.00 mm (1.260 in)
Case capacity 2.45 cm³ (24 gr H2O)
Rifling twist 381 mm (1 in 15 in)
Primer type Large pistol
Maximum pressure 258.55 MPa (37,500 psi)



12.5 inch Barrel
Fullmetal Jacket- Conic Nose "Spitzer"
Weight- 154 Gr (10g)
Velocity- 550 m/s
Joules- 1500 Joules
PostPosted: Wed Jun 16, 2010 1:00 am


Basic Information


Bullet Material

The bullet core consists of a typical lead-steel composition, that carries a conic steel penetration tip, and who's outer shell is a basic steel composition. While this causes the round to be somewhat lighter than it would ordinarily be, it increases the penetration and armor piercing ability of the round, especially against harder targets. While ordinarily fragmenting or expanding bullets would be considered most useful in such a large slower moving round, becuase of the illegal nature of these projectiles in warfare, the round instead exploits the ability for increased penetration. While lead, ordinarily used for it's ability to expand, is still present in this projectile, the lead is mostly used for it's high density in relation to steel, causing the projectile to have more mass then it generally would if it were made entirely out of steel, allowing it to be a much more effective projectile, as well as carry a small amount of compressibility and greater deformation. As well, the bullet is completely encased in a Tombac coating, which serves for a Full Metal Jacket.

Full Metal Jacket
The full metal jacket of the rifle consists of a Tombac covered jacket, designed to work in the same manner that every other full metal jacket works. The Tombac piece is designed to reduce barrel wear and reduce the lead build up inside the weapon, and be removed by the surface of whatever it contacts. In addition to this, a fine layer of polytetrafluoroethylene, or Teflon is present on the projectile. Teflon has a friction ratio with steel of nearly 0.01, making it an extremely slick and low friction interaction, reducing barrel wear and increasing the velocity of the projectile slightly. Because of this, each bullet is coated in a fine spray of Teflon, allowing the bullet to exit the barrel with as little wear to the actual barrel as possible. This as well allows the barrel to be able to support the increased velocity achieved by the bullet, as well as increase the barrel life and reduce the wear of the otherwise steel projectile. Basically, it allows for a bullet of it's kind to reduce any problems associated with it's somewhat higher velocity and high immalleability.

Dimples
Golf ball dimples have been known to increase the velocity of projectiles- footballs, golf balls, basketballs, cars, by a marginal amount. While a golf ball on average increases it's average distance by close to 65% what it usually would, most other objects do not respond this way due to their lack of surface of area facing the air (oblong shapes have differing surface areas than a sphere which has the same all around). Because of this, the dramatic increase of 54% increase in distance is felt, but this is not translated into a 54% velocity increase. Still, the dimples do provide an increase of velocity, this resulting in an 8% increase of velocity.

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Conic Shape
The Conic Shape of the improved model is a slightly altered shape of the .460 S&W. Despite the differences in the rounds, even their sizes, their somewhat similar diameter represents a close to ideal shape already made. While this slight difference does not necessarily produce exactly ideal shapes, it's ease in design and manufacture allows it to keep the weapon price at a relatively low price without many more improvements, and removes the aspect of having to design an entirely new bullet design.


Parent Case
The round is based off of the 10mm Auto, almost entirely. The , propellant and casing is almost identical, with a different round size simply necked down from the original 10mm Auto. The weight, or mass, is slightly lower, with the differentiation of density being different, and being 2-3 grams lighter in weight (13 grams to 10 grams). The bullet, obviously, differs from the original round by the previous notifications- such as the full metal jacket, the latex, the lead steel, conic shape, and the golf ball dimples. The bullet instead preforms extraordinarily efficiently, allowing it to surpass the original casing, while still keeping it's primary format and the original advantages.






Modified Round- 12.5 inch Barrel
(From five feet up)
Effective range- 350 meters
Maximum range- 650 meters

Velocity- 550m/s (1804 feet/second)
Mass- 10 grams
Energy- 1512 Joules

Suicidesoldier#1
Captain

Fanatical Zealot

Reply
Hangar 1: Infantry Weapons/ Armor- And Attachment weapons

 
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