發新話題
打印

5.56mm(.223)子彈

引用:
原帖由 ACYY 於 23-7-2009 17:11 發表
包唔包彈頭
夾埋把刀一次過寄來得唔得?
無所謂喇!
尊重人格, 請勿抄習

TOP

引用:
原帖由 MS 於 24-7-2009 02:17 發表

無所謂喇!
好野~終於都有彈頭喇
屋企D 彈全部都係有殼冇頭,更係爭咁D 野咁

TOP


整咗十粒,要就襯手
尊重人格, 請勿抄習

TOP

我send左mail比你!thx!

TOP




送子彈禆香港人最煩要奄死!粒粒鑽窿再入彈頭.....人工貴過料 英國就無此問題
尊重人格, 請勿抄習

TOP


圖中5.56mm NATO,30-30,7.62x51mm 前NATO子彈
223 Remington
From Wikipedia, the free encyclopedia
Jump to: navigation, search
.223 Remington
Designed 1964
Variants .223 Ackley Improved, 5.56x45mm NATO
Specifications
Parent case .222 Remington Magnum
Case type Rimless, bottleneck
Bullet diameter 0.224 in (5.7 mm)
Neck diameter 0.253 in (6.4 mm)
Shoulder diameter 0.354 in (9.0 mm)
Base diameter 0.376 in (9.6 mm)
Rim diameter 0.378 in (9.6 mm)
Rim thickness 0.045 in (1.1 mm)
Case length 1.76 in (45 mm)
Overall length 2.26 in (57 mm)
Rifling twist 1 in 12 in (typical)
Primer type Small rifle
Maximum pressure 55,000 psi (380 MPa)
Ballistic performance
Bullet weight/type Velocity Energy
36 gr (2.3 g) JHP 3,750 ft/s (1,140 m/s) 1,124 ft·lbf (1,524 J)
55 gr (3.6 g) Nosler ballistic tip 3,240 ft/s (990 m/s) 1,282 ft·lbf (1,738 J)
60 gr (3.9 g) Nosler partition 3,160 ft/s (960 m/s) 1,330 ft·lbf (1,800 J)
69 gr (4.5 g) BTHP 2,950 ft/s (900 m/s) 1,333 ft·lbf (1,807 J)
77 gr (5.0 g) BTHP 2,750 ft/s (840 m/s) 1,293 ft·lbf (1,753 J)
Test barrel length: 24 inches (61 cm)
Source: Federal Cartridge [1]
The .223 Remington is a sporting cartridge with almost the same external dimensions as the 5.56x45mm NATO military cartridge. The name is pronounced either two-two-three or two-twenty-three. It is loaded with a 0.224-inch (5.7 mm) diameter, jacketed bullet, with weights ranging from 40 to 90 grains (2.6 to 5.8 g), though the most common loading by far is 55 grains (3.6 g).

While the external case dimensions are very similar, the .223 Remington and 5.56x45mm differ in both maximum pressure and chamber shape. The maximum and mean pressures for some varieties of the 5.56 mm (different cartridge designations have different standards) exceed the SAAMI maximums for the .223 Remington, and the methods for measuring pressures differ between NATO and SAAMI.[2] The 5.56 mm chamber specification has also changed over time since its adoption, as the current military loading (NATO SS-109 or US M855) uses longer, heavier bullets than the original loading did. This has resulted in a lengthening of the throat in the 5.56 mm chamber. Thus, while .223 Remington ammunition can be safely fired in a 5.56 mm chambered gun, firing 5.56 mm ammunition in a .223 Remington chamber may produce pressures in excess of even the 5.56 mm specifications due to the shorter throat.[3]
History
The .223 Remington was developed as an enlarged and higher velocity version of the .222 Remington, which was introduced in 1950 as a varmint cartridge. The .223 Remington was developed specifically for the AR-15, a version of which later became the U.S. military's M16 rifle.

[ 本帖最後由 MS 於 26-7-2009 02:43 編輯 ]
尊重人格, 請勿抄習

TOP

MS您好
我要襯手, 唔知遲唔遲?
請睇E-MAIL, FROM  tomkk33.
麻煩您麻煩您

TOP

Thanks SIR

TOP

ms.老爺又係小弟,請看e-mail
thank you so much!

happy shooting!

I"ll be back..........
超齡GAME友/適齡鎗人一個
工作:20年專業舞台EVENT LIVE SHOW 製作導演、監製,廣告、MTV、宣傳片(VIDEO及PHOTO)攝影製作人。

TOP

HI MS
小弟tomkk33 ,請看e-mail
thank you! thank you!

TOP

請問誰人在9/8/09入了HK$30
尊重人格, 請勿抄習

TOP

引用:
原帖由 MS 於 26-7-2009 12:57 AM 發表



送子彈禆香港 ...
MS
其實你可唔可以講下點奄彈??小弟好有興趣
希望你係100米之外睇到La

TOP

回覆 1# 的帖子

Uncle MS, emailed to you and pending for your kind advice!

TOP

引用:
原帖由 24632198 於 20-8-2009 19:24 發表

MS
其實你可唔可以講下點奄彈??小弟好有興趣

簡單而言centre fire 內部分
1.primer
2.case
3.bullet
4.powder
如果以上四點其一點被破壞.......粒子彈不能起作用.....如果四點全破壞便不能再RELOAD......這粒子彈算奄咗...英文叫Deact..or...inert!
但一處鄉村一處例!!!法例與實制不同!.......好似香港同英國就不同喇

[ 本帖最後由 MS 於 22-8-2009 22:27 編輯 ]
尊重人格, 請勿抄習

TOP

引用:
原帖由 MS 於 20-8-2009 18:58 發表
請問誰人在9/8/09入了HK$30
是小弟.................

thank you!

happy shooting!
超齡GAME友/適齡鎗人一個
工作:20年專業舞台EVENT LIVE SHOW 製作導演、監製,廣告、MTV、宣傳片(VIDEO及PHOTO)攝影製作人。

TOP

發新話題