AR15.Com Archives
 Bullet grain for 1 and 8 twist
blackrifleboy  [Member]
11/23/2007 3:12:52 PM EST
I have a armalite m15a4t 24" stainless match barrel and I was wondering what a good grain bullet would work best in my ar. The twist rate is 1 and 8. I would like to reload I have lots of brass. this is chambered in 223 thanks I am new to the site.
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69hpbt  [Member]
11/23/2007 3:35:44 PM EST
heaver match bullets like sierrra 69hpbt or hornaday 68s should work well.
And welcome welcome
Liquidmetal  [Team Member]
11/23/2007 3:35:45 PM EST
My 1:8 Predator Pursuit (SS heavy match barrel) loves 69 gr. SMK. That's my rifle, yours may feel differently. Does OK with the lighter stuff also, but it will put the 69s into one ragged hole all day long. Never tried anything heavier.
defenderhome  [Team Member]
11/23/2007 3:36:56 PM EST
CMMG 1/8 chrome loves 69 gr. MK
SSN_Doc  [Member]
11/23/2007 3:39:30 PM EST
Mine liked Federal 45gr and Black Hills 68gr Heavy match. 75 Gr Tap also performed well.
69hpbt  [Member]
11/23/2007 3:43:06 PM EST
depending on chamber yours being .223 instead of wilde or 5.56 you might want to try the hornadays, they have a slimer ogive that might lend itself to your chamber better that said, my guns have a preference of
mrrick  [Member]
11/23/2007 4:20:59 PM EST
my barrel is 8p and the manufacturer stated it is made to run 75gr TAP and 77gr OTM.
I have not run heavier than 75 and the TAP shot at 1/2 MOA
Gamma762  [Team Member]
11/23/2007 4:24:46 PM EST
Take your pick from the heavier match hollowpoint bullets, 68-77gr, it'll be whatever your particular barrel prefers. Some of the lighter loads may give excellent performance also.
blackrifleboy  [Member]
11/24/2007 12:11:18 PM EST
It sounds like heavy loads is preferred I will try and let you know and thanks for all the response. Great site.
Phessor  [Team Member]
11/25/2007 2:33:57 PM EST
How will a 60gr Hornady VMax run through a 1-8" twist barrel?
govm4  [Member]
11/25/2007 3:08:46 PM EST
I run the Federal GM 69 grain in my NM 1:8 20" barrel. Shoots 1/2 moa or better.

Each barrel is different. You could have two 1:8 barrels on two different guns and each could like a different grain bullet.

Dont always buy into the hype that you need a faster twist to shoot a heavier bullet. I have a Bushmaster Varmit Special with a 24 "1:9 SS match barrel and it shoots the 77 grain bullets under an inch at 200 yards.
blackrifleboy  [Member]
11/25/2007 3:47:53 PM EST
How about a RRA carbine A4 with 16" barrel with 1 and 9 twist will it shoot a 55 grain BTHP with any accuracy using a hornady bullet.
razorbutt  [Member]
11/25/2007 5:00:58 PM EST
I have good success out to 600 yds with 77 gr sierra bthp matchkings/varget powder..using a 1 in 8 twist bbl.
xd-shawn  [Member]
11/25/2007 5:33:26 PM EST
i'm anxious to try some heavier bullets in my new 20in RRA varmint upper, just picked up some PRVI 75gr BTHP's at the local gun show, i need to start reloading.....

edit i should add this is a wylde chamber 1/8 twist
EL_TIRADOR  [Team Member]
11/26/2007 2:45:33 AM EST
I shoot 77gr SMK's at 200 and 300. For 600 I shoot 80gr SMK's or 80gr Bergers through my 1:8. Shoots like a house of fire!
millerized  [Team Member]
11/26/2007 2:52:19 AM EST
45gr Remington and 77gr Bergers in my 24" JP. Loves them and gives me sub-MOA all day long. Hates anything in the 55-62gr area, but still MOA at 100.

Now 200yds, the 45gr stays tight, but the 77 is all over the place. 55 through 62 is a bit over MOA, but still on target.

300yds, the 45gr is like scatter shot, the 77 is tight again and the 55 -62 stuff is starting to spread out nicely

400yds, the 77 is still MOA, but there's rarely a 45 through 62gr on an 6" plate.

Of course, your shot placement might vary
FMD  [Team Member]
11/26/2007 3:40:58 AM EST
1/8 stainless Wylde chamber here.

The barrel does not really seem to like 68/69 Gr. bullets, but it may be that they haven't "settled" by 100 yards.

75 and 77gr pills do well.

73 Gr. Berger OTMs are unbelievably accurate and out of the gun.
blackrifleboy  [Member]
11/26/2007 8:03:50 AM EST
I was talking to a guy and he said 55 grain is real good for 1 and 9 twist with a 16 inch barrel and thats from rra themselves he said dont go over 69 grains and try to stay in the low to mid 60s but that the rifle was made for 55 grains does this sound right.
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