AR-7.62x39 barrel twist questions

[850guns]

So, there's this Colt Match Target Lightweight AR in 7.62x39.
Super rare. But the slow 1:12 twist barrel makes me wonder if that's why it's so rare. I checked a couple other similar barrels I have, And they are marked 1:10.
So, given common available AK ammo, what kinds of effect does this have on ballistics?

 

[DustyDog]

So, there's this Colt Match Target Lightweight AR in 7.62x39.
Super rare. But the slow 1:12 twist barrel makes me wonder if that's why it's so rare. I checked a couple other similar barrels I have, And they are marked 1:10.
So, given common available AK ammo, what kinds of effect does this have on ballistics?

Strange... I think Chinese are 1:9.45"... which looks like a dang corkscrew, for some reason... can't believe it's not faster : )

But imagine the twist you would need for this:

https://www.midwayusa.com/product/1019570398?pid=802837

 

[DustyDog]

So, there's this Colt Match Target Lightweight AR in 7.62x39.
Super rare. But the slow 1:12 twist barrel makes me wonder if that's why it's so rare. I checked a couple other similar barrels I have, And they are marked 1:10.
So, given common available AK ammo, what kinds of effect does this have on ballistics?

Crazy stuff : )

https://www.snipershide.com/shooting/threads/hornady-subx-7-62x39-barrel-twist-rate.7164528/

 

[850guns]

So a slower spin effects ballistic coefficient. In what ways?
Should this be in the AK thread? Or other?

 

[DustyDog]

So a slower spin effects ballistic coefficient. In what ways?
Should this be in the AK thread? Or other?

Shouldn't affect BC, which is a property of the bullet alone...

 

[850guns]

Shouldn't affect BC, which is a property of the bullet alone...

I knew it didn't sound right.

 

[DustyDog]

I knew it didn't sound right.

And just guessing... but don't quote me on this... it seems a 1:12" should be fine with standard loads... might even have an advantage... if they can run massive subsonics in 1:9 & 1:8

Try it and let us know : )