The 1-9 is designed for 60 grain Aguila Subsonic Sniper rounds. My local shop is getting some in so I can test (play with) the two 1-9 barrels I got in my box.

The 1-16 is the standard twist for all normal long rifle loads.
Stingers and 22shorts are reported to perform better in 1-18 twist.

Longer bullets require a faster twist to stabilize.

I have shot both of my 1-9 barrels with regular and high velocity loads. The groups were 1" to 1 1/4" at 60 yards. I didn't try target ammo in them as I didn't expect results good enough to justify the cost.


Several of my barrels ( with 1-16 twist ) do perform very well, in the 1/2 to 5/8" range.

 

my 1-9 shoots pretty much anything under 1100fps great....60gr included!

 

Cletus, is yours a second also?

 

it's a volq bargain bin runnin boar...

i would expect the gm's to work just as well

cletus

 

Gm 1:9

I have a regular production GM 1:9, and when I stuff it onto an action that has a lot of tuning done to it, I honestly don't see any REAL difference between it, and the 1:16 for accuracy at 50 yards with Wolf MT ammo. The SSS Aguilas are kinda like firing "Skud missles" about 850FPS through the chrony, and 50 yards is probably the far end of their effective range. In a 1:16 twist barrel, the Aguila will keyhole a target, going through sideways.
I haven't tried a lot of other ammo through this barrel, but because of its versatility, I have no interest in selling it, the SSS stuff is kinda fun on like an ant hill, and stuff like that. I will say it'll go under a half at 50 with Wolf MT just as easily as a 1:16 twist barrel, just as Cletus has seen with his 1:9 barrel.

 

Rate of Twist

Sorry guys, allow me to STATE the OBVIOUS -

Rate of Twist is the number or rotations
(Like a football spiral) a bullet/projectile will turn in the length stated.

For example: In a 20" barrel - 1:9 Rate of twist - a "Fast Rate of Twist"

The bullet will complete two rotations
(and just begin the third) before exiting the muzzle.

20" Barrel - 1:16 Rate of Twist (Standard for 22 LR)

The bullet will complete only ONE rotation
(and begin the second) before exiting the muzzle.

For the NEW Guys (and some others)
I hope that CLEARS UP the muddy water on this subject.:shakehead

 

Knew that - what's surprising is the use of heavier rounds in fast twist barrels. Seems like a formula to foul the barrel and distort the bullets.

 

... Rate of Twist is the number or rotations
(Like a football spiral) a bullet/projectile will turn in the length stated. ...

The length has nothing to do with rate of twist. A 24 inch 1:18 barrel is still 1:18 if you cut in down to 20 or 18 or 6 inches. Yes the length will determine how many rotations the bullet will make before it exits the barrel but the length of the barrel has no determination on the rate of twist.

My apologizes if I misinterpreted/misunderstood your statement.

Regards Bill

 

Well, Skeeter, maybe I will try the 1-9s again, and this time with Wolf.

Most of the time I was getting pretty good groups if the flyer was thrown out.
The faster twist may just accentuate whatever difference contributed to a particular cartridge being a flyer.

 

Barrel Length and Rate of Twist

Bill,

Exactly right.

Barrel length has nothing to do with rate of twist.

I just chose a 20" barrel for an example.

 

Alright, I have an AR-15 with a 16" barrel and a 1:9 twist. I had a Navy friend of mine build mine. I am not a veteran nor a hunter, just a arms enthusiast to protect myself, my family, and my friends/neighbors if needed. When I received the build I had no idea what my rifle would prefer. I started with a heavier 60 grain with what I believe is mediocre rounds like Wolf. I went all the way down to what is considered to be a varmint round of 40 grain Fiocchi brand. That mother trucker I was hitting with my Carlos Hathaway Leatherman rifle scope @ 100 yards 6 rounds on top of each other inside of 1/2" patterns in the 🎯. I have the target to prove that, also I recorded on the target what I used and the distance. So for my 1:9 twist experience the lighter round my rifle gobbles it up like a filet mignon.

 

Welcome to RFC Slowwolf. I am a bit confused, was your AR built for rimfire cartridges, do you have a .22 RF kit installed in the upper, or is it a centerfire cartridge rifle?

You do realize this is a forum for Ruger 10/22 rifles, and the thread you are replying to is almost 20 years old. None of the posters have been back to the forum in many years, it’s a zombie thread.