1:8 twist AR15 barrel results

[ID#5]

Anyone have any personal experiance with 1:8 twist barrels?

I've heard some guys have issues with 18" or 20", 1:8 twist barrels shooting 55gr FMJ's.

-specifically poor accuracy with 55gr FMJ ammunition, while 62gr, 69gr, 75gr, 77gr shoot way better than 55gr-





anyone have that issue personally or know of anyone with this issue?


thanks

[J Mack]

What kind of issues are you hearing about?

[Nealio]

I have a BCM 18" SS410™ barrel  in 1:8 and it shoots 55's great.
Ignore 80% of what you read on the internet regarding twist and what you can and can't shoot..

[ID#5]

What kind of issues are you hearing about?

55gr FMJ accuracy in a 1:8,
[I edited the OP ]

I have a BCM 18" SS410™ barrel  in 1:8 and it shoots 55's great.
Ignore 80% of what you read on the internet regarding twist and what you can and can't shoot..

That is why I'm asking y'all, cuz y'all are not internet strangers.........

[Luvmy45]

The 55's in my 1/8 18" barrel don't group great, I can only hold around 1.5" at 100yd

But those are generic FMJBT 55gr bullets... at around 3000fps... For 3 gun... I have no problem with that.

The 62gr bullet's, that are pulled that I load.. with the same powder load as the 55gr, I have not chrono'd, but shoot just fine, and will hold under 1" at 100yd.

I would guess a heavier bullet would do even better in my gun.

I run 2 loads... 100yd and under load with 55gr... and my 62 for the longer range stuff, where accuracy counts more.

I'm sure this will evolve over the course of this season.

[Bob H]

I have two rifles with 1-8 twist neither shoot 55 fmj or 55 soft points that well around 2 inches.  But they both shoot 55 vmax and 75 bthp around an inch.  I think it has more to do with the quality of bullet and barrel than the twist.  The open base on fmjs doesn't help accuracy.

[carharttfarmer]

I use a 1-8 and do fine don't know if you noticed or not 3 gun targets are pretty big
I finally figured out my pulled 55gr bullets were actually a mix of 55&62 gr heavier bullets hit higher out of my gun but still was getting my hits

[Nealio]

With the load J Mack cooked up (24.8 WC844, 55gr Hornady bulk FMJ) I shoot under 1" with a 4x scope.  I can hit the 550 and 720 gongs in usually a couple shots at Parma.

[Luvmy45]

That's pretty much my load as well... 24.5 WC844 with 55gr FMJBT...

[EKuo]

My 1:8 bbl shoots just fine with 55 gr.  whether I hit anything has more to do with the operator than anything else. 

[3gunshredder]

Took mine out last week for the first time to stretch its legs and it hit everything I aimed at between 220y and 420y. Shot everything from 35gr to 77gr.
Adios

[Obscurem]

My 1/8 shoots 1.2 MOA with my batch of pulled 55 grainers under 25.5 H335. Same charge with hornady's is an inch and under.