q*******k 发帖数: 1103 | 1 打算进本人第一个ar15
发现barrel有两种
16” 4150 CMV Chrome Moly M4 Profile Chrome Lined Barrel 1:7, 1:8 or 1:9
Twist
•16” 4140 M4 Profile Barrel, Mag Phos or Black Nitride finish, 1:7, 1
:8 or 1:9 Twist (optional)
chrome 和第二个有什么区别,另外1:7 twist 是说什么的?
谢谢科普。 | h*******g 发帖数: 2201 | 2 1:7适合打比较重的弹头,1:9适合打比较轻的弹头。Chrome lined is more
corrosion resistant when you use dirty/corrosive ammo, and good for
longevity of the barrel, but will not be as accurate (1 inch or more spread
for 5-10 rounds at hundred yard) as stainless steel barrel(sub 1 inch
accuracy at 100 yards) | q*******k 发帖数: 1103 | 3 谢谢
accuracy可以通过增加弹头gr来改善吗?
spread
【在 h*******g 的大作中提到】 : 1:7适合打比较重的弹头,1:9适合打比较轻的弹头。Chrome lined is more : corrosion resistant when you use dirty/corrosive ammo, and good for : longevity of the barrel, but will not be as accurate (1 inch or more spread : for 5-10 rounds at hundred yard) as stainless steel barrel(sub 1 inch : accuracy at 100 yards)
| h*******g 发帖数: 2201 | 4 No, the twist rate in the barrel is to force the bullet to spin at faster or
slower rate and acquiring an angular momentum, so better stabilize against
perturbation factors during the flight such as wind or moisture on the path.
By accuracy you probably mean precision, you need high consistent
conditions during shooting to achieve that, such as uniform weight of all
the bullets you fired, same kind and weight of gun powder you use to propel
the bullets, consistent trigger pull skills not to perturb the aiming, and
free-float barrel so the vibration after shooting is not coupled to other
components of the gun, and consistent conditions of your barrel(temperature
of the barrel, vibration modes, etc).
To improve the precision, that's why skilled shooter use self-loaded ammo so
have a good control over the quality of ammo(gun powder and bullet), and
practice shooting skills(breathing, trigger pull, etc).
Probably someone on the board such as flyingspur/graycat2006 can give you
more advice on the actual practice how to improve shooting.
【在 q*******k 的大作中提到】 : 谢谢 : accuracy可以通过增加弹头gr来改善吗? : : spread
| q*******k 发帖数: 1103 | 5 thanks frog.
one last question, the twist ratio come with the barrel right?
which means I can change it by putting different barrel.
or
against
path.
propel
temperature
【在 h*******g 的大作中提到】 : No, the twist rate in the barrel is to force the bullet to spin at faster or : slower rate and acquiring an angular momentum, so better stabilize against : perturbation factors during the flight such as wind or moisture on the path. : By accuracy you probably mean precision, you need high consistent : conditions during shooting to achieve that, such as uniform weight of all : the bullets you fired, same kind and weight of gun powder you use to propel : the bullets, consistent trigger pull skills not to perturb the aiming, and : free-float barrel so the vibration after shooting is not coupled to other : components of the gun, and consistent conditions of your barrel(temperature : of the barrel, vibration modes, etc).
| T*R 发帖数: 25894 | 6 yes.
【在 q*******k 的大作中提到】 : thanks frog. : one last question, the twist ratio come with the barrel right? : which means I can change it by putting different barrel. : : or : against : path. : propel : temperature
| d*******s 发帖数: 15155 | 7 还要注意口径。
如果打精度,想用223的,就别买兼容556的管子,不然打223精度会下降。另外如果用
55gr左右的轻弹,就用1:9的 |
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