.223

[chipchip]

What is the lightest bullet that can be fired out a 223 with a 1:9 twist.

 

[Wyosmith]

Any weight under 80 grains can be fired that is .224" in diameter.
75 grain bullets do ok in some 1-9 twists. 69 grains do very well. All weights work well from 50-69
From 50 grains and down the thing you need to worry about is A. will the bullet come apart in mid are from going too fast or B. will is do what ever job you have for it to do on target.
But all can be fired

 

[chipchip]

Thanks. Was just wonder how Hornady's Super Performance 53gr 223 would work in a 1:9 twist barrel. The velocity is pretty fast.

 

[Creeper]

A 1:9 works well with FMJ, HP target and poly-tipped hunting bullets from 50 to about 75 grains. You want to avoid thin jacketed JSP type bullets 45 grains and under. I've seen 40 grain JSP "varmint" bullets come apart, from "over-stabilization", within 50-70 yards of the muzzle in a 1:7 twist... and although it's less likely with a 1:9, the potential exists.

The Hornady Super Performance has a thin jacket right under the ballistic tip to produce rapid expansion, but is thicker as you move towards the base of the bullet... so that should shoot just fine.

C

 

[603Country]

I shoot the 40 gr Nosler BT in my Ruger. The 1 in 9 twist works just fine, and I'm at near max on powder. No bullet vaporization problems to report. I have vaporized a few squirrels.

 

[kraigwy]

Was just wonder how Hornady's Super Performance 53gr 223 would work in a 1:9 twist barrel. The velocity is pretty fast.

The Army has developd a Mann Accuracy Device in 223, 1;7 twist to test our military ammo.

To test the device or set a standard they use the 52 gr Sierra.

Again the Mann Device is 1:7 twist. Your 1:9 would shoot the 53s just fine, I know because I have a Mann device and I've shot 53 hornady's in it.