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 Post subject: Re: Norinco CQ Rifle Review

Master at Arms

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Is it the only twist rater available?

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 Post subject: Re: Norinco CQ Rifle Review

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Joined: Wed Oct 27, 2010 4:50 pm
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Yes Sir,all CQ-As have 1-9 barrel twist rate.

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 Post subject: Re: Norinco CQ Rifle Review

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Thanks Sir. Somebody told me that 1/7 and 1/12 twist rates are also available.

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 Post subject: Re: Norinco CQ Rifle Review

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Joined: Fri Dec 09, 2011 11:11 pm
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KBW wrote:
Thanks Sir. Somebody told me that 1/7 and 1/12 twist rates are also available.

as far as I know , sir , the CQs presently available are having 1/9 rate of twist . The older Chinese clones , having a painted finish were having 1/12 finish but they were failed to get any positive comments world over . While the present CQs are admired for their performance . No CQ has a 1/7 rate of twist so far as i know . How ever T97NSR bullpup has a 1/7 rate of twist with 18 inch barrel


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 Post subject: Re: Norinco CQ Rifle Review

Regional Ambassador - Sargodha Chapter

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@zain, bhai jaan, can you enlighten us about the effective difference between 1:16, 1:12, 1:9 & 1:7 twist rates of .223?
other than the twist rate? :confusion-scratchheadyellow: hu'n?
.
.
I mean which one is better & why? and what do you think which one is more suitable for us poor Pakistanis? who only have two(read one) type of ammo available here until it is & mostly used for plinking.

Do we really need 1:7 or we just want it anyways? :teasing-binkybaby:

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 Post subject: Re: Norinco CQ Rifle Review

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Well , my dear Mian ji, I was also thinking to ask you the same queue of questions :mrgreen:


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 Post subject: Re: Norinco CQ Rifle Review

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Location: Karachi, Pakistan
Quote:
“Rifling” are the lands and grooves impregnated into the barrel’s interior that impart spin on a projectile as it travels down the bore. This spin stabilizes the bullet in flight, much the way a football is “spiraled” by a quarterback.

Determining proper twist is a factor of bore diameter, velocity, bullet weight and even bullet construction. There is no “golden” twist rate for all firearms. Civil war muskets such as the 1861 Springfield used extremely slow twist rates (1-in-78”) to fire heavy lead bullets with relatively good accuracy, while modern AR-15-style rifles use barrels as fast as 1-in-7 to stabilize long-for-caliber projectiles.

Conventional wisdom taught us that slower twist rates wouldn’t properly-stabilize a bullet, causing it to yaw. On the other hand, faster rates could over-stabilize lighter bullets, causing similar problems. This is correct in theory—however, modern ballisticians have pretty much de-bunked the over-stabilization theory as a practical matter. All things being equal, it is better to have too much twist than not enough.



Read more: http://www.gunsandammo.com/ammo/pair-barrel-twist-rates-ammo/#ixzz3ex1fk67R


To sum it up, 1/7 means 1 twist in 7 inches, and is faster twist that 1/9, which is 1 twist in 9 inches.
Faster twist rate is more suited for higher projectile weights, but this is a generalization, and there could be variance from rifle to rifle.

Further..

1/7 would generally be applicable for 55-85 grains
1/8 for 50-80 grains
1/9 for 45-75 grains

http://info.stagarms.com/blog/bid/37186 ... ion-Choice

so for 62 gr ammo commonly available to us today, 1/9 is good to go. Stack some up, I say..

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 Post subject: Re: Norinco CQ Rifle Review

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Good job saif bro.
The tumbling effect of 7n6 is what made the 5.45x39 so unique compared to the 5.56×45.I guess if commercial 5.45x39 doesn't have what makes the 7n6 unique then the 5.56/.223 would be far better.
Whay are your thoughts????

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 Post subject: Re: Norinco CQ Rifle Review

TGF Expert Panel

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Bobba bro
I have no idea or experience of tumbling in 7N6 cartridge, other than what is available on google. Cannot comment on that.
Coming back to CQ-A, 1/9 twist is a good solution for the general range of ammo at hand. Nothing is ideal though, unless one handloads.

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