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Thread: 1/7 twist and 55 grain rounds

  1. #31
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    At our shop, we are one of the rare CATM ranges staffed by reservists rather than active duty personnel. Of course some students that come to our range feel offended that they are being taught by reservists (matter of fact, one of our instructors was critiqued that "they couldn't belive that they had to be taught by reservists"..freakin' bigot! ) so we come up with a challenge for them. We are currently using M-193 out of rack grade M-16A2s at 25 meter targets. Air Force ranges aren't exaclty known for long range due mainly to available real estate. Well, if somebody has a problem with us teaching them, we'll take them out to the firing line with one of our instructors, each getting 20 rounds. We use 10 rounds for zeroing then we begin our competition. We set up 10 casings at the 25 meter line and you have 1 minute to see how many casings they can shoot. We haven't had an active duty shooter beat our guys yet! All-in-all, you do loose a little accuracy using the lighter 55 grain bullets but nothing that significant that it really matters. You'll be just fine shooting 55 grain bullets through a 1:7 barrel.

  2. #32
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    Quote Originally Posted by Ridgerunner665 View Post
    I intend to deer hunt with my AR (its legal here, and I'm a good shot)
    You should consider a deer rifle for deer hunting.
    "You people have too much time on your hands." - scottryan

  3. #33
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    Quote Originally Posted by demigod View Post
    You should consider a deer rifle for deer hunting.
    I have...its a S&W M&P 15...last year I used a commander length 1911 45 acp to fill my freezer (3 deer)...all were clean 1 shot kills...it's legal and I'm more than capable...nuff said.

    EDIT:...Having said that...I have a few rifles to choose from....ranging from 22lr (I've used that one too....also 1 shot kills...but not legal) up to 300 Win Mag.

    I have 7 rifles that I have used for deer hunting...25-06, 270, 280, 30-06, 7mm Rem Mag, 350 Rem Mag, and of course the good ole 30-30. You are entitled to your opinion...but the 223 is a more capable deer killer than the 30-30 ever was...and in an accurate gun (like my AR) will do fine on deer within 200 yards (same effective range as the 30-30) with the right type of bullet.

  4. #34
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    Quote Originally Posted by Ridgerunner665 View Post
    Off topic I guess but...

    I have a 1 in 9 twist 16 inch barrel...Whats the heaviest bullet that commonly works well with that twist?

    I'm looking for the heaviest, ACCURATE round...I intend to deer hunt with my AR (its legal here, and I'm a good shot)...I was thinking 68 - 70 grains...specifically the Barnes Triple Shock (62 or 70 gr.) or possibly the Federal factory load using the 60 grain Nosler Partition bullet. Than You.
    The 70 grain Barnes requires a 1 in 8" twist or faster. That doesn't surprise me since 100% copper bullets are always longer than their jacketed lead counterparts (copper isn't as dense as lead). So while 1 in 9" works fine for conventional bullets weighing 68/69 grains, that Barnes 70 grainer is probably as long as as 75/77 grain conventional bullet.

    I'm not aware of anyone that commercially loads these, this is probably a handloading proposition. Also, from bolt gun users, I've heard some guys say these are accurate, others have difficulty getting them to shoot. Assuming you limit your ranges to 150-200 yards max, I would guess you could get a load developed where accuracy was good enough for that application.

    Link

  5. #35
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    Quote Originally Posted by jmart View Post
    The 70 grain Barnes requires a 1 in 8" twist or faster. That doesn't surprise me since 100% copper bullets are always longer than their jacketed lead counterparts (copper isn't as dense as lead). So while 1 in 9" works fine for conventional bullets weighing 68/69 grains, that Barnes 70 grainer is probably as long as as 75/77 grain conventional bullet.
    I was afraid of that....theres always the 62 grain Triple Shock or the 60 grain Nosler Partition.
    I do reload so I have plenty of options...these were just my first 2 choices, and I'm still going to try those Triple Shocks on paper and see what happens.

  6. #36
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    Quote Originally Posted by Ridgerunner665 View Post
    I was afraid of that....theres always the 60 grain Nosler Partition.
    I do reload so I have plenty of options...these were just my first 2 choices, and I'm still going to try those Triple Shocks on paper and see what happens.
    I think the 62 grain version would work fine, it's just the 70 grain version I'd be cautious about.

    Nosler is a good load. Trophy Bonded also makes a 62 grain bear Claw load (I think is LEO-only), Winchester makes a 64 grain Power Point and Sierra came out with 65 grain Game King if I'm not mistaken. All would be suitable candidates for your application.

  7. #37
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    One lone example of a 1/7 twist Noveske that loves to shoot AE 55gr ball. 200 yard 3 round group at 3/8". I have a picture but don't have an online posting service.

  8. #38
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    I just purchaed a CMMG 16" 1/7 twist and plan to shoot a bunch of Wolf Gold 55grain FMJ, and I have several boxes of 60 grain tap, I expect 1 or 2 inch groups out of the tap out to 200 yds, we shall see......

  9. #39
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    Quote Originally Posted by kooncecrushed View Post
    I just purchaed a CMMG 16" 1/7 twist and plan to shoot a bunch of Wolf Gold 55grain FMJ, and I have several boxes of 60 grain tap, I expect 1 or 2 inch groups out of the tap out to 200 yds, we shall see......
    A 1 inch group at 200yards is .5MOA it aint gonna happen,

  10. #40
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    Quote Originally Posted by kooncecrushed View Post
    I just purchaed a CMMG 16" 1/7 twist and plan to shoot a bunch of Wolf Gold 55grain FMJ, and I have several boxes of 60 grain tap, I expect 1 or 2 inch groups out of the tap out to 200 yds, we shall see......

    Never gonna happen (especially if it is chrome lined).


    C4
    Last edited by C4IGrant; 02-27-08 at 09:17.

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