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Rebarreling a action to 6mm rem. - 85 to 100 grain bullets - is 1:9 the right twist rate 22 to 24 in barrel.


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I have a 6mm Creedmoor and a 6mm Remington, both have 7 ½" twist barrels. I shoot 85's through 105's.


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I have a 9 twist but would definitely get an 8 twist now. The 9 twist won't stabilize 100 grain Sierra TGK nor 90 grain GMX, they need an 8 twist. If going higher than 100 grain you might want faster.

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Originally Posted by captjohn
Rebarreling a action to 6mm rem. - 85 to 100 grain bullets - is 1:9 the right twist rate 22 to 24 in barrel.


No downside to faster twist and it opens many options. I’d go 8” twist, or maybe even 7.5”.

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Originally Posted by Hondo64d


No downside to faster twist and it opens many options. I’d go 8” twist, or maybe even 7.5”.


Same here. I'd go at least 8" twist, my 6mm Creedmoor has a 7" twist.

You're really handicapping yourself with a 9" twist with all the good 6mm bullets available today. A 9" twist won't shoot the best of them, an 8" will.

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I'd go 7", and certainly no slower than 8".

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As Hondo and others have stated, if 85gr is the bottom end of bullets you're entertaining, I'd go minimum 1:8 - the 1:7.5 and 1:7 opens up more options beyond 105 (should you choose to tinker).

My .243 and 2 6mm Creedmoors are all twisted 1:8. (bullets - 95 LRX,105 Berger & 103 ELD-X)


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I wouldn’t get anything less than 8 twist.


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I built one recently with a 7.5 twist. My 6 SLR has a 7 twist. Bullets keep getting longer...

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My little 6 CM is a 1-7.5 and I couldn't be happier. Everything has shot really well, and for a meat and taters sorta load I use the plain old 105 Hornady HPBT. It shot well with Nosler 55 BT's scorching out of it as well. Twist it up, you'll never wish for less twist. The opposite happens all the time with a lazy twist.


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The 1-9" twist will do just fine for your needs Captjohn.


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elkhunternm, you should work for Remington. grin


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Originally Posted by beretzs
My little 6 CM is a 1-7.5 and I couldn't be happier. Everything has shot really well, and for a meat and taters sorta load I use the plain old 105 Hornady HPBT. It shot well with Nosler 55 BT's scorching out of it as well. Twist it up, you'll never wish for less twist. The opposite happens all the time with a lazy twist.

Quoted for truth.


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No downside to 7” twist, unless you want to push thin-jacketed lightweights to 4000fps, in which case some of them might dissolve in flight.

OTOH, a 7” will let you shoot anything out there that I’m aware of, and you never know when the bug for something different might bite.

If you were buying an older gun with a 1-9, I’d say go for it. Since you’re paying for a new barrel, why limit yourself?


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On this topic there is more to consider than just twist, my first 6mm Remington was AI'd. my gunsmith at the time talked me into a PacNor 1-8" twist 3 groove barrel.

I never even once had a Hornady 105gr A-Max make it to target, they would blow-up coming out of the barrel, the 105gr Berger VLD worked well for a few hundred rounds and they started doing the same thing. the rest of the barrel's life was with the 107gr SMK.

I have a friend with the same chambering, different reamer, different gunsmith using a 1-8"Krieger 4groove barrel that is starting to blow up bullets also.
Makes me cringe a little on threads like this when people suggest to twist it as fast as you can and there is no down side. IMO with the case capacity of a 6mm Remington I would go with a 1-8" twist but make sure you get a 5 or 6 groove barrel.

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No down side to more twist



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Don’t limit yourself. Get the 1-7”.

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Originally Posted by jwp475

No down side to more twist


Jack wagon pretender, how many fast twist 6mm barrel's do you own ??????????

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This isn't a 6mm. It is a 6x45mm with a 1 in 10 twist barrel. These are 90 gr. Speers moving at 2700 fps. They stabilize just fine. I think in your 6mm, a 1 in 9 twist will work fine.

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Originally Posted by boatanchor
Originally Posted by jwp475

No down side to more twist


Jack wagon pretender, how many fast twist 6mm barrel's do you own ??????????


I’ve got a 7.5 and 8 twist. Why is JWP a pretender for what he said? At least for me, a Hunter using hunting bullets, what’s the downside from faster twist from 22 to 375?


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