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1/25/2018 7:38:29 AM
Posted: 1/1/2006 4:35:00 PM EST
Usually the question is 77 grainers through my 1x9??????

I know how that does, but have not personally run 55's through a 1x7.

Is it irratic?
Link Posted: 1/1/2006 4:45:49 PM EST
[Last Edit: 1/1/2006 4:46:00 PM EST by SWO_daddy]
No, they work just fine. Do a search here, the subject has been treated many times in the past.
Link Posted: 1/1/2006 4:49:37 PM EST
My Colt barrel loves'em.
Link Posted: 1/1/2006 6:20:53 PM EST
Barrel: 20" stainless steel Krieger DCM with 1:7.7" twist.

55 grain Sierra GameKings: 10-shot group at 50 yards, .355".


55 grain Sierra BlitzKings: 10-shot groups at 100 yards, .793" & .747".


Link Posted: 1/1/2006 8:42:16 PM EST
I once own a Colt Pre-Ban 20" A2 with 1/7. It was one of the most accurate rifles I have ever owned and I shot almost exclusively 55gr surplus ball. I later changed the barrel out to an M4 profile for the look but honestly wish I would have kept it the full 20". It was definately a paper punching SOB.
Link Posted: 1/1/2006 9:35:52 PM EST
[Last Edit: 1/1/2006 9:36:32 PM EST by dpmmn]
Both of my 1:7 Colt 20 inchers shoot 55 gr just fine
Link Posted: 1/1/2006 9:38:19 PM EST
I'll let you know once I get the handguards for my 20" 1x7 Bushy
Link Posted: 1/1/2006 10:30:33 PM EST
In basic training we shot mixed M193 and M855. Mixed as in a random mix in each magazine. No problems.
Link Posted: 1/2/2006 4:27:08 AM EST
No problem at all w/ XM193 amd Q3131A through my 1/7 barrels.
Link Posted: 1/2/2006 5:29:47 PM EST
[Last Edit: 1/3/2006 6:03:03 AM EST by Molon]
For anyone that has back issues of Rifle magazine there is a great article on the accuracy of 1:7" twist barrels using lighter bullets in the July-August 1988 issue.

"Results of tests in the .223 and .22-250: The seven-inch Twist is Accurate."

by C.E. Harris

pages 24-27, 43-45.
Link Posted: 1/2/2006 8:09:20 PM EST
mine likes it

Link Posted: 1/2/2006 8:22:03 PM EST
[Last Edit: 1/2/2006 8:23:59 PM EST by gmtmaster]
They shoot just fine.
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