20 PRACTICAL TWIST ?

[jcm24m]

What twist should I use for my first 20 Practical shooting 32 - 39 - 40 grain bullets ?

 

[L.Sherm]

3G 11

 

[DogBuster]

3G 10T

You'll get different answers

I run a 20-222 9T/3G

Better to over twist

Stick with the 40 V max

 

[jpx2rk]

11 twist or better. some 12 twist barrels won't shoot the 40's well or not at all, but will shoot the 39's. The 39's are rare/extinct items at this point in time. 12 twist will shoot the 32's if that is your preference.

 

[GLShooter]

I shoot a 10 twist in all the little 20's like PRAC, TAC and 204. Great luck in mine.

 

[Hotshot]

I agree with Sherm. 11 twist is perfect for what you want.

 

[Coyotefurharvester]

My TC dimension (204 Ruger) barrel is 1/10, so when I ordered a 20p AR barrel(Blackhole weapons) I went with a 1/10. No regrets, I usually shoot 35 and 40 gr bullets in both.

 

[RegionRat]

At sea level, typical 40 gr 20 cal.

1:11 is an SG of roughly 1.3
1:10 is an SG of roughly 1.57

YMMV

 

[Mark M.]

11 and don't look back

 

[hogpatrol]

Have two tens and an eleven. Don't see any difference in accuracy.

 

[Mark M.]

Its simple, with the thin jackets of the 20cal., you want the slowest twist you can get away with, 32 or 35gr. 12 for sure, 39 or 40, the 12 twist can be hit or miss, 11's the plan

 

[Fast14riot]

I had a 10 twist 3P barrel and running the 39gr TNT around 3800fps they were explosive on anything remotely soft. Shooting apples just vaporizes them!

 

[urbanrifleman]

What twist should I use for my first 20 Practical shooting 32 - 39 - 40 grain bullets ?

20 Sploder

The first targets from a customer. Keith Olson.

forum.accurateshooter.com

I've done about 30 or so in 10 twist. Mine shoot. I've been very pleased.

 

[SLAYIN'SWEDE]

3G 11T is working great for me w/ 32 & 40's

 

[hogpatrol]

Here's a 12 twist, 204 Ruger in a handi rifle. IIRC, this was with 40 gr factory ammo, 25 yard target.
My 2¢, 12 twist in a 20 caliber is looking for trouble. YMMV.

 

[nmkid]

11

 

[HillbillyLongRifle]

A True 12 twist will shoot the 40 V-Max very well.

The problem is that most barrels are not True Twist rate.

Get the 11 twist to be on the safe side.

 

[TheCZKid]

I've got a 10 twist White Oak Armament 24" barrel on an AR platform, which shoots 32 and 40 grain V-max very well. My go-to load is the 40's as I have my 20 Vartarg for the 32 grain shooting.

 

[L.Sherm]

I've got 12's that shoot the 34 v- nitemares pretty good but at the time I was looking for a cheap barrel and its all GM had, there's probably 1,000's of 11 twist out there shooting 39 snd 40's no problem.
I've never been in the camp to " over" spin bullets more than necessary because I know jacket stress can influence accuracy.

 

[Bill K]

3 grove, 1/11 twist and live very happy with the bullet weights you mention.