WOA 1-7 vs Rainier Ultramatch 1-8 18" barrel

[mastermason6]

What's the advantage?

 

[Playerz1337]

Re: Twist rate 1-7 vs 1-8

1:8 twist should work up to 75 gr bullets (depending on velocity)
1:7 twist for up to 80 gr bullets (77 gr Sierra in that category)

You're shooting an AR style rifle right?

 

[mastermason6]

Re: Twist rate 1-7 vs 1-8

Yes

 

[wnroscoe]

Re: Twist rate 1-7 vs 1-8

1-8 and 75's, life will be good.

 

[JeffinTX]

Re: Twist rate 1-7 vs 1-8

1:8 twist should work up to 75 gr bullets (depending on velocity)
1:7 twist for up to 80 gr bullets (77 gr Sierra in that category)

Not exactly true. A 1:8 will shoot the 75/77/80 just fine. So will the 1:7, but the 1:8 maybe a little more accurate with the 80s for across the course shooting with the AR (form 200-600yds), hence that is the most common barrel twist on the line in a service rifle Hipower match. The 1:7 or even 1:6.5 have been used with good effect for up to 90 grn bullets. I have encountered several 1:8 button rifled barrels are not really 1:8, more like 1:8.5 and they would not stabilize the 77/80s. The cut rifled barrels twists should be spot on, however.
The 1:7 has the mil-spec coolness factor, and that was to stabilize the longer tracer bullet, not the 62 grn ball.

 

[kraigWY]

Re: Twist rate 1-7 vs 1-8

I like shooting 80 SMKs and Berger 90s at 600 and 1000. The 1:7 for me.

 

[BCP]

Re: Twist rate 1-7 vs 1-8

I've owned both those barrels. The Ultra Match has been a better overall shooter.

 

[mastermason6]

Re: Twist rate 1-7 vs 1-8

Thanks, ordered my Ultra Match 1-8

 

[GoBig]

Re: Twist rate 1-7 vs 1-8

I have a 16-inch WOA (1/7) barrel and it's the most accurate barrel I have ever shot in a semi-auto.

 

[cloudes]

Re: Twist rate 1-7 vs 1-8

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: GoBig</div><div class="ubbcode-body">I have a 16-inch WOA (1/7) barrel and it's the most accurate barrel I have ever shot in a semi-auto. </div></div>the same to me .

 

[Hawk45]

Re: Twist rate 1-7 vs 1-8

Have an 18" WOA and it's a hammer.. almost makes shooting it boring.. Well, not really