Best barrrel length/twist for long range .270?

[mattri]

Looking for for optimal length for a .270 to shoot accurately out to 600 yards. Is there a distinct advantage to using a 26, 28 or 30" barrel? Want to shoot the higher bc 150-160s as well as the lighter 100-115 bullets. Is there a twist that will handle this range?

[pa hog]

A 1-10" twist will work with most bullet weights, I would think a 26-28" would raise velocity to usable levels without being overkill.
I'd be shooting the 150 Bergers.

[mattri]

Will the 1:9 shoot the lighter 100-115grn bullets ok? Obviously want the 150s for the long shots but would like to be able to shoot the lighter ones if possible. If not will stick with the faster twist.

[pa hog]

I'm not sure on the 1-9" but a 1-10" should work for 110-150gr's

[hotbrass]

1:9 work just fine with light bullets in a .270.

[mattri]

Thanks for the replies. going to see what the barrel co's say.

[mattri]

Who makes a 1:9 ina 26" barrel? All I found were 1:10s.

[hotbrass]

Anyone that has 1:9 twist .277 blanks longer than 26".

[Hammer]

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For a nickel or two...

Shilen or Pac-Nor would make it.

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[mattri]

Looked at Shilen, Hart, Lilja, MacGowan, Douglas and Pac-Nor no-one listed a 1:9. Anyone offering one stock or is it just a custom order?

[pa hog]

I wouldn't loose sleep over not finding a 1-9", When a 1-10" will do everything your asking. Nobody stock's one because it's not needed to Stabilize any of the the .270 bullets that are avaliable. Factory Savage 270WSM's are 1-11" Twists and fire 110gr-150gr just fine, The Savage Factory 270Win are 1-10" and do the same.

Check Berger's site for Twist rate recommendations. But if you want a 1-9" Brux can do it.

http://www.bergerbullets.com/Products/Hunting%20Bullets.html

http://www.bergerbullets.com/Quick%20Reference%20Sheets%205-3-10.pdf

[Hammer]

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Don't know what barrel makers list in their websites or catalogs.

But they have always been able to make what I have requested.


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[rjtfroggy]

http://www.opticstalk.com/forum_posts.asp?TID=19347

Try this link, it will give you all the twist rates for optimum bullet performance.

[helotaxi]

Berger says to use a 1:10 twist for their 150 VLD hunting bullets. I'd probably believe them. Those are probably the longest .277 cal bullets made. The only bullets heavier have a very blunt profile.

[Pete K.]

http://www.opticstalk.com/forum_posts.asp?TID=19347

Try this link, it will give you all the twist rates for optimum bullet performance.


Very interesting. I have been having good luck with 52 grain match HPs in a 1 in 9 twist 26" VLP @ 100 yards where it recommends a 1 in 14 for this weight. Do the characteristics of the 9 and 14 twist kind of mirror each other in a light load? I have a bunch of 69 Gr. Sierra MatchKings that I tried and decided to save for longer distances when I can find longer distances. The table shows the optimum weight for 1 in 9 twist to be for the heavier up to 75 grain weights. So my question is at shorter distances of 100 yards the lighter bullets do stabilize but the heavier weight require longer distances to do the same? Please straighten me out on my thinking. What am I missing here? Should I go back to the 69 Gr. Sierra MatchKing for 100 yard vrs the 52 grain match hps? 3300 fps compared to 2850 fps and an extra $7.45 a box or $0.15 per round. How much difference @ 100 yards. I will have to do a serious comparison between the two. They seemed very similar at the shorter distance.

Pete K. ???

[hotbrass]

Didnt know bullets came that light in .270? ::)

[Axtell3]

now don't compare apples and oranges...

[Pete K.]

now don't compare apples and oranges...


I was referring to the chart and what it lists for .223 not .270, sorry. My questions on twist 14 vrs 9 still remain. It is the concept of twist where results appear similiar between 9 and 14 and the lightest weights performance compared to the heavier weights at short distance. Still would appreciate some information.

Pete K.

[tammons]

Wow I had to read that a couple times.

Basically you can shoot a light projectile in a fast twist barrel.
Some people say you can overstabilize a bullet and that will affect its flight, but I have
read thats not true.

What will happen is a bullet can disintegrate from over spin (too fast) and never make it to the target.
That could happen to a jacketed bullet, but not a barnes or other solid copper bullet.

I had a 1:7 twist 223 and the tightest shooting load I used was 52 gr amaxes over a full hot load of varget.
Never lost one bullet. I would shoot 1/4-3/8" all day long.
That said 35 or 40 grains would have probably blown up every now and then..

[Hammer]

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Rumor has it that a 3-inch twist will over-stabilize some bullets.

But I wouldn't know.


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