22-250 "do-it-all" twist rate

[montana_native]

I am trying to decide on a twist rate that will shoot from 40-75 grain bullets out of a 22-250. I am thinking that a 10-twist might get it done at my elevation (5000').

Thoughts?

 

[Erik Cortina]

I am trying to decide on a twist rate that will shoot from 40-75 grain bullets out of a 22-250. I am thinking that a 10-twist might get it done at my elevation (5000').

Thoughts?

I would go with 1:8" twist.

 

[bheadboy]

The length of bullet you intend to use is the controlling factor.

I am attaching a Sierra formula they use to determine twist necessary for bullet/velocity etc.

Bob

 

[boltfluter]

I would go with an 8 twist just to be safe. In case you come down from the mountain. LOL. My 8 shoots 40 to 80 gn. great.

Regards, Paul

www.boltfluting.com

 

[drags]

I have a 8 twist 22x47 Lapua which is close to the 22-250 and I shoot the 80 gr. A-max. I have kills out to 510 yards on grounhogs and a deer kill at 110 yards. When groundhogs are shot they are DRT and the deer went straight down. I didn't do much load development with lighter bullets but the ones I tried showed promise. If I ever shoot out my 22-250 14 twist factory barrel I will replace it with a 8 twist barrel.
Drags

 

[Preacher]

A 8 twist will be your best bet....

 

[Larryh128]

I have a 10 twist and the 62 gr Barnes that I wanted to shoot out of it hit the 100 yd target at about a 20 degree angle.

 

[itchyTF]

Bob -
It looks like Vd raised to the 2.25 power. What is the 'V'?

 

[Erik Cortina]

Bob -
It looks like Vd raised to the 2.25 power. What is the 'V'?

It's not a "V", it's l/d

 

[itchyTF]

Thanks Erik, I see it now!

 

[sirius27c]

Huge fan of the 8 twist, there are times when a know I could shoot 90's with a 7 twist, but the versatility of the 8 twist is hard to beat, and tho9se 80 Bergers work pretty good.

 

[Erik Cortina]

Huge fan of the 8 twist, there are times when a know I could shoot 90's with a 7 twist, but the versatility of the 8 twist is hard to beat, and tho9se 80 Bergers work pretty good.

What kind of speed do you get with the 80's?

 

[johnmyers]

Huge fan of the 8 twist, there are times when a know I could shoot 90's with a 7 twist, but the versatility of the 8 twist is hard to beat, and tho9se 80 Bergers work pretty good.

What kind of speed do you get with the 80's?

Don't have it anymore but I got 3150 out of mine with 80gr SMKs. Worked well for long range prarie dogs for about 800 rounds and I never let it get too hot