Home Forums Hunting & Shooting AR and Tactical Rifles Breaking in a 6x45 Black Hole Weaponry barrel. 20", 8 twist.

I was more than impressed with the initial accuracy results seeing as to the way they came about. I built the AR and was waiting on the dies. I'm not one that's much for waiting, so off to the reloading room to load some 6x45 cartridges one way or another. I used a Sinclair Mandrel die with a 6mm arbor to neck up some once fired Winchester 2013 Military brass (With NATO cross). I then seated the bullets with a RCBS .243 Winchester seater die. I picked my dies up (Hornady 6mm-.223) on the way home from my first range session.

The second issue was, converting a few MagPul PMAG Magazines to accept and function with my cartridge overall length of 3.345. This length is necessary for the powder charge and 100gr Hornady Boat Tail Spire Point I'm using. So off to the shop with the mags and here are the results.

The 20 round PMAG on the left has been converted to hold 15 rounds with a COAL of 3.345. The 10 round PMAG on the right was converted and holds a full 10 rounds. Both are structurally sound and have fed with absolutely no issues.







Bellow are pictures of some of the first groups shot at 100 and 200 yards. I had a stiff, switchy breeze from the left at 200 yards. When I settled in to shoot at 200. I was waiting for the wind to break. Which it didn't so I used my "Machine gun" method. Which is get them down range quick and catch the same condition for all three.

20" 6x45 (TOP)
16" .264 LBC (BOTTOM)

I was sitting and looking at some of the groups that this rifle has shot when I noticed a mistake with the measurement and math on one of the above targets and corrected it .

The orange dot is a 3/4" dot so there was no way that three shot group measured .557 outside to outside.

Friend SMACK,

Black Hole Weaponry is still kind of an unknown. Having said that, their 3-groove polygonal barrels are incredible.

My latest build was a 5.56 using all Noveske parts and a BHW barrel. The accuracy is beyond all of my wishes and expectations.

GREAT choice, my friend.

Blessings,

Steve

Some nice lookin' rigs there Smack; they shoot petty well too! That's a pretty slick mod to those mags...you should have filed for a patent

That's a great looking rifle & it looks like it's going to shoot too.

What's your barrel break-in procedure?

(PS: Just remember that 3 & 5 shot groups no longer define accuracy here anymore..........it's now 10x2 groups, minimum, but tomorrow it might be 20 going to 30)

MM

Very interesting pics with the Pmags, thanks.

Who made the extended take down pins on the grey rifle? Both of those are sweet looking guns.

What kind of velocity?

.243 bullet holes in paper aren't .243".

But it's still very nice!