BHW AR-15 20" Rifle Length Stainless Steel 5.56 1:8 Poly Barrel

I measured velocity for more ammunition in a very favorable summer conditions (T=75F/RH=85%). All ammo is 5.56x45mm (I don't shoot .223). Chronograph was 6 feet from the muzzle. Chamber heat soak was distributed uniformly between tested ammo. @0 rounds was fired for each ammo.
Winchester 62gr OT (G1-0.217): v=3111.4 ft/s; SD=22.4 ft/s; Sound Barrier=650 yards.
Hornady 68gr HPBT (G1=0.343); v=2993 ft/s; SD=20.7 ft/s; Sound Barrier=875 yards.
Hornady 75gr HPBT (G1=0.372); v=2828.6 ft/s; SD=48.6 ft/s; Sound Barrier=875 yards.
Black Hills 77gr SMK OTM (G1=386); v=2864.6 ft/s; SD=37.2 ft/s; Sound Barrier=925 yards.
This barrel is very fast. As I commented before I got some very good results at 600 yards last winter. So far this is an excellent SS barrel I tested in terms of accuracy and velocity.

Went shooting today (T=21F; RH=98%) from 200 to 600 yards.
After re-zeroing my scope at 200 yards (was using it at higher temps and lower humidity) I recorder 0.75 inch 5 rounds group at 200 yards. That was the best group of the day. Shot another group and stayed under 2 inches with 10 rounds.
Than moved to 600 yards (calm weather). Shot 2 groups with 5 and 8 rounds. The first group ended up at 5.88 inch and another 5.38 inch.
I had another rifles to try so I stopped there.

Nice piece of hardware

Finally got another chronograph and measured velocities out of my new build with this barrel. T=57F/RH=41% (all ammo is 5.56x45mm, 20 rounds)
IMI razor core 77gr OTM: Velocity=2802 fps/SD=27 fps
Black Hills 77gr OTM: Velocity=2799 fps/SD=30.8 fps
Black Hills 77gr TMK: Velocity = 2788 fps/SD=27 fps
As expected faster than factory claimed 2750 fps. IMI is loaded hot and it will produce 2720 fps from 16 inch Windham Weaponry 1 in 9 HBAR (tested same day as this barrel).

I bought this BHW 20 inch barrel as replacement for my Stag Arms 20 inch HBAR (one of the worst barrels I ever had). Just managed to shoot it today. Very accurate (I free floated the rifle too). I had swfa 10x42 optics on my rifle. After sighting in at 100 yards and getting some impressive results (under 1 inch easily 5 or 10 rounds if I do my part) I moved to 200 yards (I zero my ARs at 200 yards). Temperature was 22F. Wind was 5mph but coming in gusts which I tried to avoid. I had targets at 200 yards. I shoot multiple 10 inch groups after zeroing in. They all ended up under or around 2 inch. Average group was around 1.75 inches at 200 yards. I used Black Hills 5.56x45mm OTM 77gr. After that I tried to measured muzzle velocity but stupidly shoot my chronograph.
This barrel is meeting and exceeding my expectations.

This barrel is by far the most accurate barrel I have had on my AR-15. After following BHW’s barrel break in recommendations it’s hard to find a load that doesnt shoot sub-moa.

I used it for my brother's build 20in barrel on a carbine receiver. He sighted in at 25m and went through the break in period. He told me he pulled it out of the closet and went to the range a couple weeks ago and was holding a tight group at 100m.

Look and fit are awesome. 5 stars might be premature seeing that I haven't shot it yet. Feedback on this barrel leads me to believe 5 stars is a proper rating. We'll see.

Broke in barrel per Black Hole recommendations and during the process shot a single jagged hole at 100 yards with Hornady 68 grain FMJBT Match over 24.8 grains for RL 15. Couldn't be more pleased