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 Which Rifle Twist is right for me 1-7, 1-8 or 1-9??
Reservior_Dog  [Member]
3/4/2012 11:58:50 AM EST
Looking to purchase a 16 inch middy barrel and trying to find out which twist right for what purposes. Please shed some vast knowlege my way!
Thanks in advance!
RD
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Finslayer83  [Team Member]
3/4/2012 12:04:01 PM EST
what are you using the rifle for?

If for plinking / HD / SHTF then 1/7 or 1/9 will be just fine for you.

I prefer 1/7 to cover all my bases, but have nothing against 1/9.

It all depends on what you shoot the most, 55 grain, 62 grain, 75 grain, etc....
Reservior_Dog  [Member]
3/4/2012 12:08:44 PM EST
Use will be from plinking to zombie appocilpse .. lol I'm thinking heavier the grain the more twist then? Also.. is there a spell checker on this?? sorry for my typing
scottybr  [Member]
3/4/2012 12:09:33 PM EST
Originally Posted By Reservior_Dog:
Looking to purchase a 16 inch middy barrel and trying to find out which twist right for what purposes. Please shed some vast knowlege my way!
Thanks in advance!
RD


1:8 will shoot 55gr cheap ammo very well in my experience.

Depends on what you are going to be using the rifle for. Intended use dictates bullet weight which dictates barrel twist.

scottybr  [Member]
3/4/2012 12:12:23 PM EST
Originally Posted By Reservior_Dog:
Use will be from plinking to zombie appocilpse .. lol I'm thinking heavier the grain the more twist then? Also.. is there a spell checker on this?? sorry for my typing


Any of the twist rates will be ok for that. Whatever you can get the best deal on I would get.

FMJ  [Team Member]
3/4/2012 12:53:05 PM EST
1/7 pretty much does it all
45gr to 100
Reservior_Dog  [Member]
3/4/2012 1:14:02 PM EST
What would be a 1-9 work for in particular?
TeeRex  [Team Member]
3/4/2012 1:21:36 PM EST

Originally Posted By Reservior_Dog:
What would be a 1-9 work for in particular?

generally up to 68-69, but some barrels will shoot up to 75, but you can't count on it.
Reservior_Dog  [Member]
3/4/2012 1:39:40 PM EST
So 1-7 is the way to go then..
Andrew9869  [Member]
3/4/2012 1:52:37 PM EST
I bought a box of 45 grain by mistake, and it shot fine out of my old 1/7 BCM 20". Accuracy was acceptable for plinking, The heavier the bullet the better for that twist, but you can shoot whatever is on sale if its just at paper or cans.
Reservior_Dog  [Member]
3/4/2012 2:02:45 PM EST
so.. from what I'm gathering on here is 1/7 for heavy and 1/9 for lighter grain bullets??
juslearnin  [Team Member]
3/4/2012 2:06:02 PM EST
As said above, 1/7 will do 55 gr to as heavy as you want. The one thing that 1/9 would do better is .22. If you are looking getting a .22 conversion, it is my understanding that the 1/9 will be much more accurate than the 1/7 (1/12 would be even better). This would be the only reason that I would pick a 1/9 over a 1/7.
Reservior_Dog  [Member]
3/4/2012 2:08:02 PM EST
Got it thanks! Now i see why most good mfg of barrels are sold out of the 1/7
abc123omg  [Member]
3/4/2012 2:28:48 PM EST
i have 1/8, best of both worlds? lol
SYSTEM  
3/4/2012 2:31:35 PM EST
Topic Moved
YoteSlayer69  [Team Member]
3/4/2012 2:32:12 PM EST
In classic Arfcom fashion the correct answer is..................................Get both.........


I have both and would get the 1/7 the next time. No real advantage to a 1/9. And 1/8 is a twist looking for a bullet to shoot.LOL
azarby  [Member]
3/4/2012 4:25:11 PM EST
Originally Posted By abc123omg:
i have 1/8, best of both worlds? lol


Yup, my 1/8 18" puts 68 grs into .25" at 100yds
FMJ  [Team Member]
3/4/2012 7:17:01 PM EST
Originally Posted By juslearnin:
As said above, 1/7 will do 55 gr to as heavy as you want. The one thing that 1/9 would do better is .22. If you are looking getting a .22 conversion, it is my understanding that the 1/9 will be much more accurate than the 1/7 (1/12 would be even better). This would be the only reason that I would pick a 1/9 over a 1/7.


my 2 1/7 twist M4s shoot the win USA 45gr HP just fine

several others have shot bullets less than 55gr

There might be some reports on the ammo forum I know molon like the 52gr SMK

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