[ARCHIVED THREAD] - 5.56 Chamber Accuracy with Lighter Bullets

Posted: 1/26/2006 5:05:16 PM EDT

I would like to see what kind of accuracy you Guys get with 40-55 grain bullets
from a 5.56 Chamber.
I shoot mostly 40-55 V-Max for yotes.
Got Pics of grouping

Posted: 1/26/2006 5:36:50 PM EDT

[#1]

The chamber isn't really going to make any difference... Its the barrel twist ratio that stabilizes the bullet to achieve maximum accuracy... With the shorter lighter bullets a slower twist ratio is beneficial... The 1:10" twist ratio will stabilize 40-55 grain bullets the best... You could even get decent results using a 1:12" twist barrel too...

Posted: 1/26/2006 5:40:16 PM EDT

[#2]

Here are two 10-shot groups from 100 yards using 55 grain Sierra BlitzKings. The barrel was a Colt 16" HBAR with a 1:9 twist and a NATO chamber with chrome lining. (The groups were shot off a bench using a high-power Leupold scope.)

Posted: 1/26/2006 5:43:23 PM EDT

[#3]

Not a tack driver but not to bad either... Its average grouping for what your using...

Posted: 1/26/2006 5:45:51 PM EDT

[#4]

i tried many commercial loads of 55gr in my Colt 1:9 barrel...most 10 shot 100 yd groups were 1"...a few were 1 1/4"...all shot from a bipod rest with 4x10 scope

Posted: 1/26/2006 6:28:15 PM EDT

[#5]

What I am conserned with is the Long throat in the 5.56
I will not be able to get close to the lands hand loading 40-55 gr. V-Max Bullets.
I want a tack drive.
I am thinking of getting either a Fulton Varmint Upper 20" 1:9
or an Olympic K-8 1:9 20" Bull.
Both are 5.56 Chambers

Posted: 1/26/2006 7:25:44 PM EDT

[#6]

This is one of my better 5 shot groups with my scoped Bushy hbar with the Winchester 45gr varmint ammo.

Posted: 1/27/2006 3:58:34 PM EDT

[#7]

WWB 45 gr, 24", 1-12 twist, RRA Varmit (Wylde Chamber). These are typical groups. BHBB 52 gr. MHP groups somewhat better.

Posted: 1/27/2006 9:26:01 PM EDT

[#8]

Nice Groups Guy's:
I am trying to deside on a 20" Bull or an H-Bar
Will be hunting Yotes and it must shoot under MOA or I don't want it

[ARCHIVED THREAD] - 5.56 Chamber Accuracy with Lighter Bullets

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[ARCHIVED THREAD] - 5.56 Chamber Accuracy with Lighter Bullets

[ARCHIVED THREAD] - 5.56 Chamber Accuracy with Lighter Bullets