Anyone had success shooting heavier bullets (over 62 grain) in their AUG 1/9 twist barrels. Also what has been your most accurate ammo for the AUG?

I don't know but I've been buying both, waiting for the answer to that.

I have shot 62 grain IMI and 55 grain IMI with great results.  Also my A3 loves Lake City 55 grain.
I have also shot 69 grain Privi, 75 gr. Hornady and both were good too.
They are very accurate rifles, hopefully the FN barrels will be like the Sabre barrels because mine is excellent

Did the heavier 69 and 75 grain bullets shoot as accurately as the 55 and 62 grain bullets in your 1/9 twist Sabre barrel?

I have tried the 55g FMJ LC stuff... the AUG can do about 2 1/4 inch groups @ 100 yards with it. I tried 64g Speer GDSP and it did a bit better  at about 2 inches. Hornady 75 grain BTHP TAP did about the same. I run a TA33R8 ACOG on mine (16" barrel) and about 2 inch groups (prone) is the best I can do so far with the ammo I have had available. I would like to try some 62 grain FMJ 5.56 and see if that is a sweet spot as i would like to see a 1 inch group from this rifle. From what I have read about this weapon , a 2 inch group is about what is expected.

Standing unsupported is awesome though. I can hold better groups with faster fire rates ( than with my M&PT M-4 wanna be) plus I can zip from target to target faster with less effort.

i've had 2" groups at 100 yds with Hirtenberger 62 gr with my AUG-A1

Your rifle's twist rate plays a large part in choosing the right bullet. The most common twist rate is 1:9, and it should (make sure you test it to be sure) stabilize 75gr bullets, and some even work with 77's. 1:8's can stabilize pretty much everything but the longest 100 gr bullets, and 1:7's can use any bullet listed. If you're stuck with 1:12, your choices are narrowed down significantly.


http://ammo.ar15.com/project/Self_Defense_Ammo_FAQ/index.htm#.223

The AUG A3 CQC are 1/9 twist barrels. I was hoping some folks would have real world experience with their AUGs 1/9 twist barrels using 68gr+ bullets, expecially 75 and 77 grain..

It should do well with 69gn bullets, possibly even 73gn.

Mine was a 20" 1:9 and shot very well with 69gn bullets. It did shoot 77gn SMKs, but I never went beyond trying a few magazines through it. Very accurate rifle (considering its design), if you were able overcome the trigger.

http://www.steyrarms.com/nc/news/items/article/return-of-the-steyr-aug/

Unfortunately, at the time of the test, no SS109 ammunition was available, but there was plenty of M193 around.
Shooting 3-shot groups at 100 yards, the AUG grouped both IMI M193 and CorBon 55-grain FMJ into 3-1/2".
I thought it could do better than that, and it did.

Hornady 55-grain Varmint Express and Winchester 55-grain Ballistic Silvertip averaged 2", and then it got even better.
Federal 55-grain Hi-Shok averaged 1-1/2" while
the absolute best groups were turned in by Hornady 40-grain Varmint Express averaged 3/4" to 1".

Hmmm.. so lighter huh? I 'll give it a shot.

The author of the article in the January 2013 issue of Guns and Weapons for Law Enforcement posted the following results of shooting five-shot groups at 100 yards with the new AUG A3 with the FN barrel, tulip flash hider, and VLTOR receiver:

Hornady 75 TAP FPD    2,634 fps    1.75 inches
PMC 55 FMJ·BT            2.956 fps    1.35 inches
Winchester 45 JHP        3,211 fps    0.80 inches

That's not too far off from what I get out of my Sabre-built A3. My gun loves the Hornady 75 grain TAP. Hot or cold, it'll hold under 2 inches all day long. I can't wait to get the VLTOR gun for AUG #2 to see how well those FN barrels shoot for myself.