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Posted: 6/11/2009 3:52:07 PM EST
from what I've read it seems the 1 in 7 gives more options on bullet weights. Have heard 1 in 9 may not stablize heavy bullits. ture? what do you advise?
Link Posted: 6/11/2009 3:54:41 PM EST
All of my rifles are 1/7, except for one that's 1/8. more flexibility that way.
Link Posted: 6/11/2009 4:20:19 PM EST
I'm in the same boat as jcrowl, except that four of mine are 1/9.

As far as 1/9 and heavy (75gr) bullets go, some 1/9 barrels will stabilize them just fine-and some of them won't. If you think you are going to want to use heavier defensive OTM rounds like Hornady 75gr TAP for example, a 1/7 barrel would be a sure bet. If you're going to stick to 69gr and lighter, a 1/9 would suit you just fine.

For this reason I prefer 1/7 barrels, particularly in my defensive carbines. A 1/7 barrel will work fine with 55gr ammo like XM193, but will also stabilize the heavier defensive rounds. A 1/7 barrel becomes marginal for 52gr and lighter varmint type bullets, but that's not a problem for me as I tend to favor heavier versus lighter. A 1/7 barrel with a light bullet is kind of like a 1/9 barrel with a heavy bullet-some of them work and some of them don't.
Link Posted: 6/11/2009 4:31:08 PM EST
[Last Edit: 6/11/2009 4:34:59 PM EST by gee223]
I like my 1in7 so far. Haven't been out much though. I only bought it because JT was out of 1/9 twist M4s at the Indy 1500. It was grab this or wait a LONG mail order time. I definitely made the good choice! I like 1/9 or 1/8 for the long barrels, but 16 and less will all be 1/7 from now on.
Link Posted: 6/11/2009 4:32:56 PM EST
1:7 thanks. I think I have one in 1:9, all the others are 1:7
Link Posted: 6/11/2009 4:35:15 PM EST
Originally Posted By jcrowl:
All of my rifles are 1/7, except for one that's 1/8. more flexibility that way.


this and.....












Link Posted: 6/11/2009 4:39:19 PM EST
If you have the option, I would definatley go with the 1:7
Link Posted: 6/11/2009 4:42:24 PM EST
I would go with the 1 in 7 it works better for heavy bullets.


Link Posted: 6/11/2009 4:48:13 PM EST
Originally Posted By jcrowl:
All of my rifles are 1/7, except for one that's 1/8. more flexibility that way.



This.
Link Posted: 6/11/2009 9:40:55 PM EST
thanks to all tha answered.
Link Posted: 6/15/2009 11:16:28 AM EST
so why would anyone get a 1 in 9?
Link Posted: 6/15/2009 11:20:23 AM EST
1/7 always..........I have shot anything from 55 to 75 in mine and groups are VERY tight. I will never own a 1/9 again
Link Posted: 6/15/2009 11:36:08 AM EST

Originally Posted By SayM14:
so why would anyone get a 1 in 9?

if you only shoot prairie dogs and use 40gr bullets, no reason for a 1:7, hell 1:12 would probably be better for those light little bullets. surplus is 55-62grn (m193, m855), so the majority of people who don't reload shoot bullets that are 69grn or less.
Link Posted: 6/15/2009 5:57:01 PM EST
Most users hyperventilate about getting a 1:7. then shoot 55 grain bullets all the time.
Link Posted: 6/15/2009 6:10:30 PM EST
Does anyone know of a 16" 1:8 threaded HBAR (pref blackened)?

Or even a 1:7?

I just don't like the M4/CAR profile … having a Bull threaded just seems wrong.
Link Posted: 6/15/2009 8:26:49 PM EST

Originally Posted By zazou:
Does anyone know of a 16" 1:8 threaded HBAR (pref blackened)?

Or even a 1:7?

I just don't like the M4/CAR profile … having a Bull threaded just seems wrong.

you could probably have adco do one for you - use a rra varmit 1:8 16" middy and then blacken it - possibly some contouring. also there are 1:7 like these - http://www.centurionarms.com/products/p005_recce_barrel.html
Link Posted: 6/15/2009 8:56:16 PM EST
Personally, I don't think it matters whether 95% (98%???) of civilian AR owners have 1/9 or 1/7 twist. For most people it is much ado about nothing, if you are shooting 55gr. range ammo at 50/100 meter targets.

It matters more whether you have a good barrel/bolt by a reputable maker and have taken care of it, than whether you have 1/7 or 1/9 twist.
Link Posted: 6/15/2009 9:06:10 PM EST
[Last Edit: 6/15/2009 9:07:06 PM EST by lamarbrog]

Originally Posted By LX200:
Most users hyperventilate about getting a 1:7. then shoot 55 grain bullets all the time.

Yeah... I make sure to always get 1/7...

But I don't think I've ever shot anything heavier than 62 grains. and 99% of what I shoot is 55 grains.




Will you die without it? No.



But... It sure is nice to be able to use the heavy bullets, if you ever want to.


If you have the option, no reason to close doors.
Link Posted: 6/15/2009 9:53:35 PM EST
How well does 1/8 compare to the 1/7 with the 75 and 77 grain bullets?
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