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Posted: 3/16/2006 4:12:09 PM EDT
Ok, so I have a 16" HBAR with a 1/9 twist on my AR. I have a good idea on what all this means but if someone could help explain this better to me that would be helpful. Maybe explain the different purposes different twists and bullet grains serve? IDK, whatever you think I should know. Much appreciated. -Lance
Link Posted: 3/16/2006 4:19:03 PM EDT
hmmm...



...search...



TWIST.
Link Posted: 3/16/2006 4:31:55 PM EDT

Originally Posted By lanceB:
Ok, so I have a 16" HBAR with a 1/9 twist on my AR. I have a good idea on what all this means but if someone could help explain this better to me that would be helpful. Maybe explain the different purposes different twists and bullet grains serve? IDK, whatever you think I should know. Much appreciated. -Lance



Lance, you should do a search, but I'll give it in a nutshell.

1/9 twist will shoot anything 40gr to about 69gr.
1/7 twist will shoot anything from 55gr to 77gr.
1/8 is usually a match barrel (with match chamber) and is ideal for the 68-69 gr. stuff.
Link Posted: 3/16/2006 4:32:17 PM EDT
Anything lighter than 70 grains will stabilize for sure. Anything above 75 grains will not. What's in between you have to test in yoru rifle. That's all there needs to be said on the subject.
Link Posted: 3/16/2006 4:32:50 PM EDT
[Last Edit: 3/16/2006 4:33:15 PM EDT by SWO_daddy]

Originally Posted By NoAim:

Originally Posted By lanceB:
Ok, so I have a 16" HBAR with a 1/9 twist on my AR. I have a good idea on what all this means but if someone could help explain this better to me that would be helpful. Maybe explain the different purposes different twists and bullet grains serve? IDK, whatever you think I should know. Much appreciated. -Lance



Lance, you should do a search, but I'll give it in a nutshell.

1/9 twist will shoot anything 40gr to about 69gr.
1/7 twist will shoot anything from 55gr to 77 80 gr.
1/8 is usually a match barrel (with match chamber) and is ideal for the 68-69 80 gr. stuff.


Fixed it
Link Posted: 3/16/2006 4:42:59 PM EDT
[Last Edit: 3/16/2006 4:45:28 PM EDT by calimove]

Originally Posted By NoAim:

Originally Posted By lanceB:
Ok, so I have a 16" HBAR with a 1/9 twist on my AR. I have a good idea on what all this means but if someone could help explain this better to me that would be helpful. Maybe explain the different purposes different twists and bullet grains serve? IDK, whatever you think I should know. Much appreciated. -Lance



Lance, you should do a search, but I'll give it in a nutshell.

1/9 twist will shoot anything 40gr to about 69gr.
1/7 twist will shoot anything from 55gr to 77gr.
1/8 is usually a match barrel (with match chamber) and is ideal for the 68-69 gr. stuff.




how do you tell what barrel(twist) you have?
Link Posted: 3/16/2006 4:44:15 PM EDT

Originally Posted By GhostRing:
hmmm...



...search...



TWIST.



i have do that and this is what it comes up with

"No Topics Found"
Link Posted: 3/16/2006 4:44:57 PM EDT

Originally Posted By calimove:

Originally Posted By SWO_daddy:
Anything lighter than 70 grains will stabilize for sure. Anything above 75 grains will not. What's in between you have to test in yoru rifle. That's all there needs to be said on the subject.




how do you tell what barrel(twist) you have?



"most" should have it stamped on the barrel somewhere...maybe under the handguards (1/7...1/9...etc.)
Link Posted: 3/16/2006 4:47:18 PM EDT
[Last Edit: 3/16/2006 4:58:21 PM EDT by dalesimpson]

Originally Posted By calimove:

Originally Posted By GhostRing:
hmmm...



...search...



TWIST.



i have do that and this is what it comes up with

"No Topics Found"



When I just searched "twist" this is what I got:


Forum Search Limited To 1000 Results (20 Pages) :: 105 Results Found :: Compiled In 5 Seconds
Link Posted: 3/16/2006 4:48:08 PM EDT

Originally Posted By calimove:

Originally Posted By GhostRing:
hmmm...



...search...



TWIST.



i have do that and this is what it comes up with

"No Topics Found"






twist

AR15 board
30 days

pretty full page...
Link Posted: 3/16/2006 5:00:52 PM EDT
you guys forget that you are team members and get more than like 30 days of search window
Link Posted: 3/16/2006 5:03:32 PM EDT
My search was 30 days...to replicate a non-member search...
Link Posted: 3/16/2006 5:07:00 PM EDT
Thanks fellas. You answered my question.
Link Posted: 3/16/2006 5:14:18 PM EDT

Originally Posted By jerrmy:
you guys forget that you are team members and get more than like 30 days of search window



Sorry, my search was 3 months. I didn't realize that cheap bastards non team members only got 30 day searches.
Link Posted: 3/16/2006 5:20:38 PM EDT

Originally Posted By GhostRing:

Originally Posted By calimove:

Originally Posted By SWO_daddy:
Anything lighter than 70 grains will stabilize for sure. Anything above 75 grains will not. What's in between you have to test in yoru rifle. That's all there needs to be said on the subject.




how do you tell what barrel(twist) you have?



"most" should have it stamped on the barrel somewhere...maybe under the handguards (1/7...1/9...etc.)



found it on top of my barrel right in front of the front sight...http://home.comcast.net/~hotairgypsy/DSC00076.JPG
Link Posted: 3/16/2006 5:30:46 PM EDT

Originally Posted By calimove:
found it on top of my barrel right in front of the front sight...home.comcast.net/~hotairgypsy/DSC00076.JPG



Here's the decoder of what you have:

B = Bushmaster

MP = Magnetic Tested

5.56 NATO = 5.56 NATO chamber (a little looser than .223 SAAMI and WYLDE but can shoot milsurp ammo)

1/9 = 1 full twist in 9"

H BAR = Heavy Barrel profile (thick under the handguards).
Link Posted: 3/16/2006 5:52:27 PM EDT

Originally Posted By NoAim:
5.56 NATO = 5.56 NATO chamber (a little looser than .223 SAAMI and WYLDE but can shoot milsurp ammo).


So can the Wylde.
Link Posted: 3/16/2006 5:53:08 PM EDT

Originally Posted By SWO_daddy:

Originally Posted By NoAim:

Originally Posted By lanceB:
Ok, so I have a 16" HBAR with a 1/9 twist on my AR. I have a good idea on what all this means but if someone could help explain this better to me that would be helpful. Maybe explain the different purposes different twists and bullet grains serve? IDK, whatever you think I should know. Much appreciated. -Lance



Lance, you should do a search, but I'll give it in a nutshell.

1/9 twist will shoot anything 40gr to about 69gr.
1/7 twist will shoot anything from 55gr to 77 80 90gr.
1/8 is usually a match barrel (with match chamber) and is ideal for the 68-69 80 gr. stuff.


Fixed it

Link Posted: 3/16/2006 5:56:23 PM EDT
very cool...i have been wondering what the break down was....
Link Posted: 3/16/2006 5:57:13 PM EDT

Originally Posted By SWO_daddy:

Originally Posted By NoAim:
5.56 NATO = 5.56 NATO chamber (a little looser than .223 SAAMI and WYLDE but can shoot milsurp ammo).


So can the Wylde.



There's also better accuracy gained with the Wylde chamber compared to the 5.56 when using .223 ammo...
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