Gunsmithing Twist rate for 7mm for 168gr to 180gr vld ?

[mike harper]

7mm twist rate for 165gr to 180gr, 26" to 28" 5R barrel, wanting to use 168gr or 175gr vld's. Lots of good info on the 6.5's tw/r

Thank you

Mike Harper

 

[michael_aos]

Re: Twist rate for 7mm for 168gr to 180gr vld ?

I was told a 9-twist would probably be fine, but I went with an 1:8.5" twist in my 284 Winchester.
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[7mmRM]

Re: Twist rate for 7mm for 168gr to 180gr vld ?

1-9 will do.

 

[JC Steel]

Re: Twist rate for 7mm for 168gr to 180gr vld ?

1/8.7 or 1/9 is perfect

 

[Engine 22]

Re: Twist rate for 7mm for 168gr to 180gr vld ?

1:9 twist works for me shooting 168s from my 280AI. My bud's 7STW flings the 180s rather well from his 1:9.

 

[Shortdraw]

Re: Twist rate for 7mm for 168gr to 180gr vld ?

My 1:8 twist is shooting 162Amax-168SMK's really well. It is a 7mm-08.

 

[ackleyfan]

Re: Twist rate for 7mm for 168gr to 180gr vld ?

1-8" to 1-9"

 

[turbo54]

Re: Twist rate for 7mm for 168gr to 180gr vld ?

I like "too much twist"... 1:10 for a 308, 1:8 for a 7mm. That said, I jumped on a 1:9 Bartlein when I found one ready to go...sure beats waiting a year!

 

[ZLBubba]

Re: Twist rate for 7mm for 168gr to 180gr vld ?

I've had solid results from 1:9 for both the 168 and 180 VLDs.

 

[Frank Green]

Re: Twist rate for 7mm for 168gr to 180gr vld ?

A 1-9 is fine for up to 180's in like a .284win. / .280Rem. type case or bigger.

If you want to try 180's in like a 7mm-08 then I would jump to a 1-8.5.

My buddy is throwing 180's out of a .270wsm necked up to 7mm and he is throwing them 3170fps. I did the twist calc. on his loads and came up with a 1-9.3 min. We do his barrels at 1-9.25.

My .284win. F-class gun is a 1-9. You can see a picture of the gun on the thread Bartlein Barrels sponsors the U.S. F-class team on the F class competition forum thread area of SH.

Later, Frank
Bartlein Barrels