1:12 twist

[glockk9mm]

Will (.223) 55gr ammo work well with the 1:12 twist? or is it to slow? I know I've read somewhere that lower gr ammo will be better with this twist, but how accurate will the 55's be in the 1:12 twist?

[FreedomIsNotFree]

How much time do you have on your hands?

read this....

http://www.ammo-oracle.com/body.htm#milammo

[3rd_gear]

1:12 twist should be OK, the original twist of the M16A1 was 1:14, I think. Then changed to 1:12 to stabilize in very cold, dense air. May not stabilize bullets longer than the 55gr m193.

[guimus]

I have a 1:12 barrel on a NEF rifle. It works great with 45 gr varmint loads and marginal with 53 grain loads. Then again, the rifling isn't nearly as deep or strong as on an AR barrel, so you can probably get a little more mileage out of yours. (I'm assuming you have an AR 1:12)

[glockk9mm]

I have a 1:12 barrel on a NEF rifle. It works great with 45 gr varmint loads and marginal with 53 grain loads. Then again, the rifling isn't nearly as deep or strong as on an AR barrel, so you can probably get a little more mileage out of yours. (I'm assuming you have an AR 1:12)

sorry I should of mentioned it at the top, but it's not an AR, It's a howa varmint 20" heavy barrel bolt rifle.

[m24armorer]

Shoot 55, 52 or if you can find them 45 or 47 gr. With your twist the lighter bullets will be better. If you handload, 52 gr just rocks if you pump up the FPS.

[classical_buff]

1:12 twist rate

I found this on ar15.com:
Hope this helps & hope I didn't break any rules!

http://www.ar15.com/content/products/barrels/twist.html

"By Corey Sattler (Webmanager@olyarms.com)

Here is the info I have collected for .223 twist ratios from various sources (including in-house testing & ammo manf. contacts).

1x7 - technically too tight of a twist for any .224 bullet widely available, including the 80 gr. Manufactured originally to stabilize SS109 and/or tracer ammo, but further military testing has shown other twists to be superior. Some of the very heavy custom stuff (87 gr?) may work well, but why????

1x8 - great twist for 69-80 gr bullets. Sierra once informed me that the perfect twist for their 80gr was 1x8.2xxxxx (blah blah blah big long engineers explanation followed).

1x9 - good all around twist ratio. Best suited for 52-69 gr, but either end of the envelope will be questionable.

1x10 - practically the same as 1x9, but favors the lighter side a little more.

1x12 - great for the 40-52 gr bullets. Most often found on bolt action rifles as their primary use is varminting. All right for the 55 gr, but not the best.

1x14 - if you want to understabilize the .224 bullet, use this twist. Useless except for tumbling effect it causes upon bullet impact. IMHO, better to shoot straight with a good HP bullet as your chances to hit are better and damage will most likely be greater also.

About the author: Mr. Sattler is the Law Enforcement Sales Manager and Archival Records Manager at Olympic Arms, Inc. in Olympia, WA and has been with the company since 1993. He is also a Reserve Deputy in a small Southwest Washington county Sheriff's Office."

[glockk9mm]

Does anyone know where I can get the lower gr. ammo? I have alot of 55gr ammo, I would just like to try different loads. From my understanding on what I read on one of the links above the 55gr ammo will not be as accurate at 100yrds from the 1:12 twist. right? Or did i just understand wrong.

[xrMike]

Walmart sells big boxes of 40-something grain Remington .223.