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View Full Version : best barrel length and twist rate for 5.56 or .223 rifle


david1kw
01-18-2006, 12:50 PM
what is the best combo of bbl length and twist rate??

delloro
01-18-2006, 1:01 PM
which is better, ford or chevy

blondes or redheads

you get the idea.

my preference is 20" chrome-lined 1/7 twist. others will disagree, but nothing else has such a wide range of ammo choices, and shorter barrels lose velicity for what I consider an insignificant increase in "handiness."

ocabj
01-18-2006, 1:12 PM
what is the best combo of bbl length and twist rate??

5.56 for practical/tactical use. 223/wylde/match for service rifle competition.

20" for service rifle or longer range use (beyond 300 consistent).

16" and below for close quarters or lightweight/carbine manuverability.

1 in 7" and 1 in 8" for beyond 70gr bullets. 1 in 9" is optimal for 55 and 62.

ldivinag
01-18-2006, 1:21 PM
5.56 for practical/tactical use. 223/wylde/match for service rifle competition.



mind explaining this one?

triaged
01-18-2006, 1:24 PM
which is better, ford or chevy

blondes or redheads

Too easy...

Chevy, Redheads, and 16" 1:9" twist chrome lined heavy barrels;)

BigAL
01-18-2006, 1:37 PM
what is the best combo of bbl length and twist rate??

C'mon man. You're gonna have to tell us what your intended uses are.

ocabj
01-18-2006, 2:02 PM
mind explaining this one?

5.56 NATO chamber will safely shoot all 5.56 NATO spec ammo and commercial .223 Remington.

5.56 NATO ammo should not be used in barrels chambered for .223 Remington or some other .223 'match' type chambering.

Read ammo-oracle.com for more information.

A 5.56 chamber will allow you to shoot military spec and commercial ammo safely. So this is the best chambering for the all around AR (ie: SHTF, combat, tactical use, etc).

Service rifle shooters will want a tighter chamber for competition use. Thus, most people will get a barrel chambered in something like .223 Wylde or some other .223 'match' chamber.

phish
01-18-2006, 2:04 PM
Too easy...

Chevy, Redheads, and 16" 1:9" twist chrome lined heavy barrels;)

very easy: Ford, all of them! :D

for barrel configs, tells us what you want to do and somebody'll set you straight

I myself prefer a Wylde chambered 1:8, 20" barrel.

http://www.njhighpower.com/

check out the above link for more info, click on the "reloading stuph" link to the left

6172crew
01-18-2006, 4:49 PM
Ask what the Marines are using, the A2 upper 1-7 works well for them.

rkt88edmo
01-18-2006, 4:55 PM
what is the best combo of bbl length and twist rate??


http://ammo-oracle.com/

Answers to all of your questions lie within.

Clodbuster
01-18-2006, 6:01 PM
If 1/9 is optimal for 62gr, why does the Military issue 1/7 for the ammo?

Clod

5.56 for practical/tactical use. 223/wylde/match for service rifle competition.

20" for service rifle or longer range use (beyond 300 consistent).

16" and below for close quarters or lightweight/carbine manuverability.

1 in 7" and 1 in 8" for beyond 70gr bullets. 1 in 9" is optimal for 55 and 62.

BigAL
01-18-2006, 6:05 PM
If 1/9 is optimal for 62gr, why does the Military issue 1/7 for the ammo?

Clod

Because the miltary shoots a lot of other stuff including very long bullets like tracers that require a faster twist.

triaged
01-18-2006, 6:05 PM
If 1/9 is optimal for 62gr, why does the Military issue 1/7 for the ammo?

Clod
Because of less dense traser ammo. Because it is less dense it will be longer than a lead (or lead/steel) bullet.

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

Gunsrruss
01-22-2006, 8:27 AM
very easy: Ford, all of them! :D

for barrel configs, tells us what you want to do and somebody'll set you straight

I myself prefer a Wylde chambered 1:8, 20" barrel.

http://www.njhighpower.com/

check out the above link for more info, click on the "reloading stuph" link to the left
I ordered this same set up from First-strike-products.com and I'm impressed. I started shooting high expert and Master scores right away. Last month I had my classification changed to Master. Of course I also found out that I was using the wrong Bob Jones diopter in my rear site after the classification change,( whole new story). Today is a better day after finding that out. The ladys name is Anna at first strike. She became distingu shed in 2005. Good shooter. I'm going to send my old upper back to her for a rebarrel with 1x8 twist with the wildy chamber,it works for me.