It's time to go BLACKOUT---300 AAC/Blackout ammo

brucewayne

最近新入了300BLK这一新口径，究竟这个弹药性能如何呢？下面简要分析一下Barnes 110 gr TAC-TX

*各种弹头的细微区别：The Barnes Black tip Tac TX (part # 30811) has a minimum expansion threshold of 1400 FPS. The Barnes Tac X SBR (Part # 30834) has a minimum expansion threshold of 1500 FPS. All other Barnes bullets including the TSX (part # 30835) that the OP asked about have a minimum expansion threshold of 1900-2000 FPS which is similar to most standard cup and core hunting bullets. The 110 grain bullets generally get about a 2400 FPS muzzle velocity. I get 2500 FPS from Barnes TTSX (#30871).


首先上一些基本数据和配方：

Name: 300 AAC Blackout
Bullet Weight: 110 gr
Case Trim Length: 1.358 "
S.D. 0.166
B.C. 0.289
Bullet Style: TAC-TX
Primer: Federal 205
COAL: 2.250 "
Barrel Length: 16 "
Case: Remington
Twist Rate: 1:8 "
Powder: H110 (Hodgdon)
Charge: 18.2-20.2 gr
Velocity: 2213-2415 fps


10% ballistic gelatin test:
Barnes 110gr TSX

Calibration depth (Inches, corrected to 590 ft/sec impact velocity) (Ideal gelatin block penetration depth = 3.4”)  3.5/3.4/3.5 "
Impact velocity (Measured at 7ft)  2276/2159/2265 (ft/sec)
Deepest Penetration Depth   21.9/21.2/18.0 (inch)
Block Calibration Velocity (ft/sec): 584
Block Calibration Depth (inch): 3.4
Block Calibration Temperature (Degrees Fahrenheit): 41.5
Block Core Temperature (Degrees Fahrenheit): 40.9
Impact Velocity (ft/sec): 2276
Deepest Penetration Depth (inch): 21.9
Maximum Crack Diameter (inch): 3.4
Maximum Crack Diameter Location (inch): 4.0
Cavitation Depth (inch): 0 – 14.6
Notes :
Bullet recovered surface area – 0.177 square inches
Bullet recovered diameter – 0.475”
Bullet recovered weight – 109.7gr
Test site conditions – 65 degrees Fahrenheit, 44% relative humidity
Time out of refrigeration prior to shot impact – 3 minutes



对比5.56 NATO

Ammo: .223 77 grain Copper Alloy Jacketed Open Top Match rounds with cannelure. Nosler bullets loaded to NATO (military) pressure specifications in Winchester brass by Black Hills as per special order.

Rifle: Preban 16" Colt M4 1:7 upper on a Bushmaster lower.

Temp: 92F
Humidity: 60%
Alt: 215 ASL

The target was a FBI spec block (20x20x50cm) of 10% ballistic gel (9 parts water, 1 part gelatin by weight). Vyse ballistic gel was prepared according to FBI ballistic gel testing protocols. Additionally, gel temperature was not permitted to exceed 37 degrees C at any time during preparation.

Following preparation, gel was stored at ~4 degrees C and permitted to cure for 72 hours before testing. Gel was tested within 15 minutes after removal of blocks from refrigeration. Gel blocks were calibrated with a .177 caliber BB immediately before testing. (Optimum = 8.5cm @ 590 fps). Our results were within accepted calibration standards for ballistic testing without penetration measurement adjustment.

Mean Velocity: 2733 fps
Total penetration averaged 12.5"
Wound cavity size at its extreme was typically 3.875" @ 4-5 " and numerous fragments were deposited at the extreme edges of these fractures, indicating high tissue disruption potential even at the frontiers of the round's tissue disruption.




对比FBI推荐5.56
5.56 mm Fed 62 gr FBI TBBC JSP (XM556FBIT3) fired from 16" 1/7 barrel AR15
ave MV of 2920 fps
BG: Pen = 16.5", NL = 1.5 cm, Max TC 11.5 cm @ 9 cm pen/extending to 17 cm, RD = 0.46", RL = 0.32", RW = 56.6 gr
AG: Pen = 14.6", NL = 0 cm, Max TC 8 cm @ 7 cm pen/extending to 16 cm (9cm=3.54331 "), RD = 0.40", RL = 0.33", RW = 39.0 gr


突破障碍物能力：



目前在搜集300BLK的相关信息，稍后编辑总结一下以便参考。欢迎各位发表不同看法和见解，共同进步




http://sadefensejournal.com/wp/?p=1093

brucewayne

已更新，希望对大家有帮助。

xinxin19

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brucewayne

xinxin19 发表于 2014-4-7 16:58
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上面所列5.56弹药也一点都不便宜啊，靶场就找最便宜的或者复装呗。手枪家防弹一样很贵的

zher

长知识