Home Forums Hunting & Shooting AR and Tactical Rifles 7.62x39 in the AR-15

Thanks!

Shane,

Did you run the H3 from the start? And is that a standard buffer spring?

Sweet setup!

[i][/i]

Travis,

Initially I was using a rifle stock/buffer system. That worked well.

Then I went to a standard 3.0 oz carbine buffer in the M4 style buttstock. That worked well too, but I could feel the buffer hitting the back of the extension tube with a solid thump.

Then I ordered some tungsten weights and made the standard buffer into a 5.4 oz H3 buffer. This works great too, and the buffer isn't pounding the back of the extension tube. It feels very smooth.

I'm using a standard carbine spring (AR-Stoner) .

Gotcha. Thanks.

IIRC I've only shot handloads in it. I don't recall if I entered it in the 10 shot challenge, but I have one photo where it put 10 into 1.67" and the next 10 into 1.34". That was 123 Noslers over 28gr of 1680, in Lapua brass. I reckon with some tuning it could keep 5 in an inch.



I also have a Ruger #1 in 7.62x39, with a 22" barrel - 2550 with 123's was easy, and I was not pushing it hard, running 1680. It has a pretty long throat, so I do want to try 150's in it. The 123's I've tried, the Hornady SST and the prototype Nosler BT, seem to be pretty frangible

Something I've realized lately is that my eyes are not what they once were. I'm 57, wear bifocals.

Through the reading lens I can get a clear front sight, but cannot see anything downrange. Through the upper lens, I can only get a blurry front sight, but I can see downrange.

I like the basic simplicity of the irons, but reality is I can shoot about 3" with optics, and 6" with irons, at 100 yards. That's with this carbine and Tula ammo

Pretty much in the same boat at 59, but that actually sounds just fine for this round/upper.

Tag

This thread has just convinced me to putter around with one of these uppers. It can be costly spending time on the computer.

Don't do it, cuzz I might be tempted. That said, I'm going 300 Blackout, just cuzz BCG/Mags are the same and I have a bunch of both.

I'll post a report.

That's the spirit....

I went back and forth trying to decide. There still might be room for a 300BO for me also.

One thing about the 300BO that caught my attention, it's possible to chamber and fire a 300BO round in a 223/5.56 chamber. There are pics of kabooms out there. That's not a deal-breaker for me, but good to be aware of, and always double check what's what.

I like the 300.

And the Grendel, but I don't have time or opportunity to use any of them much.

That's a scary thought.
I have never been to worried about confusing ammo and rifle.

But I never had two rifles as easy to confuse as several AR's.

Given the plethora of accessories, there has never been a rifle as easy to color code as an AR.

I don’t have a 300 BO anymore, but when I did, the furniture and the PMAGs were FDE.

Color coding is a great idea with the 300BO.

Nobody wants their range day to end like this:

https://www.ammoland.com/2016/09/avoiding-the-300-blk-ar15-kaboom/#axzz5TvLL5cwf

Or this:

https://www.thefirearmblog.com/blog/2015/01/13/psa-always-known-caliber-300-blk-5-56-kaboom/

This is true, BUT - it's not that hard to just avoid using 300 Blk ammo that will chamber in a 5.56. That didn't really exist commercially until a few years ago, and only happened to handloaders when using shorter bullets. The original intent, using bullets profiled like the 125 NBT, was that the ammo would not chamber in a 5.56 except by repeated attempts to hammer the bolt closed. If you use a bullet like the 110 V-max and seat it deep enough, the round will chamber in 5.56 because the bullet doesn't hit the chamber shoulder first.

Personally I thought it was a huge mistake when Nosler started selling their Varmageddon load that would chamber in 5.56 barrels. I don't know if they were the first to do so commercially, but they were the first I knew about.