I'm thinking of doing 1-9 barrel for my next 7mm rifle, talk me out of it.

[Mike Matteson]

What are you crazy ? 1 in 9 in a 7mm RM ? You know who shoots 7mm RM in 1 in 9 ? The Taliban , thats who ! You know who else ? The Communist's !

Don't do it , for America !

Stock twist rate in a Rem 7mm Mag is between 1:9 to 1:10. So where are you coming from?

 

[Elk Hunter 338]

I have shot and built piles of 7rem mag's, 7STW's, 7Rums, 7LRM's, 28 nos, 7RSAUM's, 7wsm's, 7-300WSM's etc. with 9 tw and they will flat shoot in a 9TW even the 195 EOL

 

[Phil Rizzo]

I have shot and built piles of 7rem mag's, 7STW's, 7Rums, 7LRM's, 28 nos, 7RSAUM's, 7wsm's, 7-300WSM's etc. with 9 tw and they will flat shoot in a 9TW even the 195 EOL

Do you think elevation is a factor?
Or none

 

[Varmint Hunter]

I have shot and built piles of 7rem mag's, 7STW's, 7Rums, 7LRM's, 28 nos, 7RSAUM's, 7wsm's, 7-300WSM's etc. with 9 tw and they will flat shoot in a 9TW even the 195 EOL

It sure would be hard to argue with this ^^^^^^^^^^^^^^^^^^^.

 

[highfinblue]

The more I shoot the Bergara I just bought in 7MM PRC with a 9TW I am confident you'll be fine to do it. Haven't shot anything heavier than 175 yet, it's only a 22" barrel because I shoot suppressed, but I'm getting a shade over 2900 fps, and I haven't hit the top yet.

 

[Elk Hunter 338]

Do you think elevation is a factor?
Or none

Yes it will fo sho

 

[highfinblue]

Shot steel out to 500 today with 175 ELDX and banged my silhouette every time I pulled the trigger, hit 50 rounds today so it should only get better from here.

 

[lancetkenyon]

If you want a little faster than 1:9" to make sure you have the stability for most high BC bullets without varporizing the ELD-Ms, you can look into 1:8.4", 1:8.5", or 1:8.7" available by various makers.

 

[Laguna Freak]

I just sold my 28 Nosler with a 1-8 twist barrel. It wouldn't shoot the 180 ELD-M's at all. They disintegrated before reaching the target. I was told they were spinning to fast and coming apart, I couldn't refute that. I am building a 7-300prc and am leaning towards the 1-9 twist for it. I did all the calculations on the Berger stability calculator, and it said the 9 twist stabilizes even the 195 Berger's. I was hoping the slower twist wouldn't disintegrate thinner skinned bullets, like the ELD-M. I love the 180's and would like to stay in that area for hunting but would like to be able to shoot the heavier Berger. I can order either barrel from Bartlein. Where am I going wrong with my thinking?

I don't shoot a 7 but I put a Bartlein 1:8.5 5R on my LA 300 WSM. I chose the twist out of concern I may have only mono's to shoot in the future. My barrel shoots 200 and 210 cup and core Noslers very well.