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View Full Version : Twist rate in .223 barrels



paul.222
02-12-2008, 09:28 AM
I'm thinking of buying an ar-15 type rifle in .223, they offer two different twist rates a 1-8 and a 1-12. What do you think is the best choice for all round use? I'll probably stay in the 50-70 gr. bullet weight. You hear some saying go 1-8, I'm just not sure!

Many Thanks
Paul

clowdis
02-12-2008, 09:32 AM
The 8 twist will shoot the 52/53 grain match bullets just fine. Then if you want, you still have the option of moving up to the 69/75/80 grain bullets.

chino69
02-12-2008, 09:39 AM
Go for the 1 in 8"; why limit yourself? The 1 in 12" will stabilize 55 grn. with no problem but once you get to the heavier bullets, you'll want the faster twist rate.
Chino69

flatlander
02-12-2008, 09:46 AM
Some guys seem to think that if you've got a fast twist AR bbl., you've got to shoot 69s & heavier to get any accuracy. I don't know where this got started, but it's a load of BS. A good 8-twist bbl. will shoot 52-53gr. match bullets into tiny little groups, yet still give you the option of using the heavier bullets if you want/need them at longer distances.

f d shuster
02-12-2008, 10:05 AM
I also believed I could not use 50 to 55 gr. bullets with a 1-7.8 Krieger,(AR-15). Frank White, Compass Lake, assured me they would be fine, and he was right. I now have the option of 50 to 77 gr, bullet weights. Faster is better.:)

paul.222
02-12-2008, 10:17 AM
Thanks fellas, I was leaning heavy toward the 1-8, but just wasn't completely sure! Now I know I'll go with the 1-8!

Thank You
Paul

geneinnc
02-12-2008, 11:13 AM
My Bushmaster 16" Match Barrel is 1/9 and it shoots everything well. I can use a sandbag and make head shots at 100 yards on a IDPA target. That's with an EOTech (no magnification) and WOLF ammo. Too bad it's not a flat top. I would love to try it with handloads, a Leupold on top and a nice light trigger. You should be just fine with the 1/8 barrel.

Enjoy your rifle.

tylerw02
02-12-2008, 04:43 PM
Some guys seem to think that if you've got a fast twist AR bbl., you've got to shoot 69s & heavier to get any accuracy. I don't know where this got started, but it's a load of BS. A good 8-twist bbl. will shoot 52-53gr. match bullets into tiny little groups, yet still give you the option of using the heavier bullets if you want/need them at longer distances.

I bet to differ. Mine doesn't handle 5x gr bullets very well at all compared to 68s and 69s and I have a 1:9"! It will handle them, but not as well as the heavier bullets.

lefty o
02-12-2008, 04:52 PM
each and every barrel is an individual. some barrels of the exact same twist rate will shoot some bullets, and another wont. best group my 1-9" barrel has ever fired was with 45 gr bullets.

geneinnc
02-12-2008, 09:44 PM
I bet to differ. Mine doesn't handle 5x gr bullets very well at all compared to 68s and 69s and I have a 1:9"! It will handle them, but not as well as the heavier bullets.

5X bullet?

tylerw02
02-13-2008, 12:16 AM
50-59gr. X for a generic number as there is everything from 50, 52, 53, 55, etc...

geneinnc
02-13-2008, 01:31 PM
who said old farts can't learn something new!:o

brickeyee
02-14-2008, 03:22 PM
Lighter bullets in a faster twist puts a real premium on the bullet quality.

The 1:7.5 I have shoots premium bullets of any weight, but more 'standard' fare does not do well below ~60 gr.