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Thread: Why not 1/8 twist?

  1. #161
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    My personal choice of weapons or hypothetical deployment scenarios isn't the topic. I simply said post COHERENT and RATIONAL questions and responses.

    Quote Originally Posted by COONDOG View Post
    Please answer me this sir, if you were going out the door into tropical jungle, desert, and urban areas in both with full knowledge of contact in all settings, what would your choice of rifle and handgun be (ammo supply guaranteed)? Also what would you assign the designated marksman for carry.

    Just the proliferation of ammo cartridges blows me away since my time, rifles and pistols of all sorts as well. I'm saying it is a respectful question, as well as most likely a learning situation for me. Thank you.



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  2. #162
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    I have had better luck accuracy-wise with 1/8 over 1/7, in my own limited personal experience.

  3. #163
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    Larue 1/8 twist barrels are incredibly accurate with everything.

  4. #164
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    Quote Originally Posted by markm View Post
    This... and rifle bullets don't apparently arc nose down at the end of the trajectory like Artillery shells. They retain the same pitch from muzzle to target.
    So you are saying even though the path is an arc, the rifle bullet itself maintains the same pitch? I never knew that and I think it is interesting. I am going to have to pay closer attention at the shape of the bullet holes when it is my turn to pull targets.

    Is the same true for handgun projectiles fired at distance, say 100-200 yards?

    The fastest twist .223 barrel I own is 1:8 and it does well from 100 to 600 yards with 52g-80g projectiles. If I decide to try shooting 1000 yards with a .223, it will require shooting heavier projectiles and I will have to go to a faster twist.
    Last edited by T2C; 05-24-14 at 12:37.
    Train 2 Win

  5. #165
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    [QUOTE=Todd.K;1862192}the bullet not tracking the trajectory theroy has never been observed in rifle trajectories that I know of. It comes from artillery or mortars where the projectile has to make a VERY sharp turn at the top of a VERY steep trajectory.[/QUOTE]

    http://www.freerepublic.com/focus/fr/843705/posts

    In particular: At this extreme surveyed range, the angle of fall of the Martini 480-grain lead bullets was about 65 degrees to 70 degrees judging from the holes in the moist sand. Bullets were found in the sand behind the 22-foot-high target at a distance of only 35 feet. It was evident that they struck the sand point on, as the lead noses were always found rough.

    ...and

    In this respect the Armory's 500-grain balls surpassed the Martini's 480-grain balls, which did not penetrate more than 6 inches into sand. In trying to get the correct 3,200-yard elevation, the long range bullets were thrown over 300 yards beyond the target. These were then dug out of the beach and all were found to have struck point on

    Rifle bullets do nose over & follow the path of trajectory
    INSIDE PLAN OF BOX
    1. ROAD-RUNNER LIFTS GLASS OF WATER- PULLING UP MATCH
    2. MATCH SCRATCHES ON MATCH-BOX
    3. MATCH LIGHTS FUSE TO TNT
    4. BOOM!
    5. HA-HA!!

    -WILE E. COYOTE, AUTHOR OF "EVERYTHING I NEEDED TO KNOW IN LIFE, I LEARNED FROM GOLDBERG & MURPHY"

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  6. #166
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    Quote Originally Posted by T2C View Post
    So you are saying even though the path is an arc, the rifle bullet itself maintains the same pitch? I never knew that and I think it is interesting. I am going to have to pay closer attention at the shape of the bullet holes when it is my turn to pull targets.

    Is the same true for handgun projectiles fired at distance, say 100-200 yards?
    Yes.... according to the madmen over on Accurateshooter. I'd have lost that bet if I had to guess.
    "You people have too much time on your hands." - scottryan

  7. #167
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    Though I'm not a big fan, Todd Hodnettt covers it on the magpul video.


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  8. #168
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    Quote Originally Posted by markm View Post
    Yes.... according to the madmen over on Accurateshooter. I'd have lost that bet if I had to guess.
    I would have lost that bet as well.
    Train 2 Win

  9. #169
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    I've been searching that site and haven't found anything definitive. Someone got a link? So far, all I've found is that in the case of the Sandy Hook Long Range tests, bullets do indeed nose over to follow the trajectory
    INSIDE PLAN OF BOX
    1. ROAD-RUNNER LIFTS GLASS OF WATER- PULLING UP MATCH
    2. MATCH SCRATCHES ON MATCH-BOX
    3. MATCH LIGHTS FUSE TO TNT
    4. BOOM!
    5. HA-HA!!

    -WILE E. COYOTE, AUTHOR OF "EVERYTHING I NEEDED TO KNOW IN LIFE, I LEARNED FROM GOLDBERG & MURPHY"

    http://i115.photobucket.com/albums/n289/SgtSongDog/AR%20Carbine/DSC_0114.jpg
    I am American

  10. #170
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    As I understand it we wouldn't have spin drift if the bullet wasn't trying to follow the trajectory

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