I was wondering if I could get some advice on once again. I am in the process of getting a barrel ordered for an 7stw build, but I can not choose between a 1:8 and a 1:9 twist. I plan on using bullets that are between 160 and 175 and using it for deer, elk, and long range shooting what one would fit my needs the best and what brand

thank you!

A 9 twist will be fine for bullets in that weight range.

Krieger 4-groove 1-9" twist

I’ll be the odd guy.
I’m always for faster is better.
Go 8

8”

Jordan Curious why 8 twist? If the OP wanted to shoot 180-195gr I could see that. Also if the OP is having a barrel made then ok.

8t. Because it’s the door to mucho BC bullets.

Not to mention the STW is going to be right at home with 180’s and that’s The undoubtable evolution Of where the OP will end up.

go with the 8 twist and kieger barrel is an excellent choice,with that much powder for a 7 stw I would shoot the heavest grain barnes x bullet..

Because good-quality bullets are only getting longer. A 9” twist is already marginal for some of the best LR bullets in 7mm, and 8” isn’t excessively fast for even the lighter 7mm bullets. For the criteria given in the OP, 160+ gr bullets used for LR shooting means that an 8” twist is ideal, given current bullet technology. Even the 175 ELD-X is best served by an 8” twist, let alone the 180 ELD-M or the 195 Berger.

I just sent back a 7mm barrel I custom ordered because it arrived with a 9” twist, when I spec’d an 8” in the order...

I agree if the OP wants to build a LR rifle and shoot long slick bullets which I would definitely recommend. The 180/195 7mm bullets are amazing.

CHS
What's the specs on the rifle so far? Have you given the 180/195gr LR bullets much thought?

I have not given those bullets any thought. I only plan on staying within the 160-175 bullet range but all of this information is great to me

9T should stabilize up to 180’s just fine depending on the barrel and velocity, but nowadays I would go 8T and never look back. The 8 will do great with 160-175 class bullets and is best with the 180-195 class bullets that you will likely transition to if you get even semi serious about the LR game.

Is anyone making a factory 1 in 8 twist 7 Mag?

I think the only factory rifle to come with an 8" twist 7mm barrel is the Fieldcraft in 7-08.

+1 in a 7STW

bonx barrel company in Wisconsin will build a 8 twist barrel for you,bonx makes great barrels too plus whatever contour you want,they built me ruger #1 barrels in 257 W.mag to fit two of my Ruger #1`s.

Brux?

I just ran the 9 twist at 3000 fps with a berger 168 at o altitude using bergers twist calculator and it was fully stable and I think that is being conservative velocity with a 7 STW

I ran 168 Bergers 3140fps and 175gr Hornady Spire points 3100fps out of my 7STW.My rifle is a Remington Sendero factory barrel.I think it's 1-9 1/4 twist.No problem with the175gr.They were very accurate.The problem I had with Bergers are they are so long and the 7STW case is very long,I run out of mag box before I could even get close to the lands with them.I would have to load single shot to get close to the lands.

I had a reamer ground with zero freebore, and it shoot the 120 and 140g tipped tripple shocks into tiny little groups. So the OP knows, the 140g Tipped tripple shock will out penetrate any 175g cup and core bullet. Pac Nor did my work and their barrels are fantastic, mine was a three groove 11 Twist for shooting up to 150g Nosler's.

ON deer, I have shot more of the 140g Nosler Combined technology bullets than anything else, 3550 fps, and deer never take a step at 550 yards(distance of our food plot). We have never had a failure with them, never.

We have had 3 rifles built on this reamer, two SS 7 Mag sendero barrels set back, and one Pac Nor 11 twist, 26" with the 140's at 3650.

My first zero freebore reamer went to my cousins in Missouri, they are still shooting the old Nosler 120g Solid base at 3800 fps in about 6 different rifles, 500 yards is long range.

Anyone going this route, should consider the OAL and mag box length and have your own reamer ground with zero to .020 freebore. You may have to deal with doughnuts somewhere down the line, but we have not. You do not fill the case full of powder- so keep that in mind.

Also, when the barrel is being chambered, have the gunsmith mill the action for fitting a Wyatt's magazine box that will give you another .125 in length.

Keith,
What reamer were /are you using that has zero freebore? and in what caliber?

Thanks,
Bill

The SLOWEST twist I would do is an 1-8......

8 twist is the route I went...