Got started in .300 Blackout...

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AndyC
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Got started in .300 Blackout...

Postby AndyC » Mon Nov 20, 2017 11:30 am

I found a deal for a .300 BLK upper via FB at a price I couldn't resist, so I reluctantly (HA!) bought it and got 100 rounds of Fiocchi to push through it (and scavenge the brass for reloads, of course). Too many other simultaneous projects going on to shoot it much, but I slapped it onto an orphaned Frontier Armory plastic lower (which I've still not been able to break) and put 15 rounds through it to zero the little red-dot I slapped onto it; it shoots pretty nice.

I then bought some Hornady dies as a little treat for myself as I have plenty of .30-cal bullets and H110 powder (I normally use the latter for .410 shotshells) ; just need to buy some SR primers sometime and I'm ready to play around.

The most recent addition is a Griffin Armament taper-mount muzzle-brake onto which I'll be able to mount my suppressor; who know, this might make for a nice little hog-gun or something, but at the very least it'll be a cool little platform to learn about the .300 BLK cartridge.

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Re: Got started in .300 Blackout...

Postby RogueUSMC » Mon Nov 20, 2017 1:08 pm

I think the .300AAC loses muzzle velocity after about 11 inches of barrel but I am not sure how much...hafta google it...lol
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Re: Got started in .300 Blackout...

Postby RogueUSMC » Mon Nov 20, 2017 1:23 pm

A man will fight harder for his interests than for his rights.
- Napoleon Bonaparte
PFC Paul E. Ison USMC 1916-2001

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AndyC
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Re: Got started in .300 Blackout...

Postby AndyC » Mon Nov 20, 2017 2:32 pm

Very interesting - thanks :thumbs2:
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Sidro
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Re: Got started in .300 Blackout...

Postby Sidro » Mon Nov 20, 2017 4:13 pm

You are going to like that little rifle very much Andy. I have a 16"AR rifle for wife and I,also a 8.5"AR pistol with scopes on both. The scope on the pistol is a cheap UTG 3-9X32 1" BugBuster Scope with QD mount. It is 2 " high at 100 yards and the first mark under the crosshairs we use at 225 yards to shoot clay pigeons on our backstop using 110gr ammo. The little round is going to surprise you and coyotes or hogs just can't take it. Have fun with your new toy.


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Re: Got started in .300 Blackout...

Postby LeonCarr » Mon Nov 20, 2017 4:34 pm

I own several ARs in .223/5.56, one in 6.5 Grendel, and one in 300 Blackout. The most accurate AR I own is the 300 Blackout.

Classic mixmaster AR...Bushmaster M4 type lower with BCM PNT Trigger, Aero Precision upper, Bushmaster BCG, Brownells Nitride 16 inch 1/8 twist government profile barrel with carbine gas and A2 flash hider, mid-length free float handguard with low profile gas block under the handguard, and a 3-9x40 Nikon Buckmasters Scope in a Burris PEPR Mount.

With a 125 Grain Nosler Ballistic Tip, a near max load of H110 in LC reformed brass with WSR primers, it averages 2207 fps with 3/4 MOA or better accuracy, with 3 shots into one hole often if I do my part. I literally have not shot a three shot group over .75 inches at 100 yards with that barrel. Not bad for a barrel I bought on sale from Brownells for 84.99.

The little round has grown on me, I think it will grow on you too.

Just my .02,
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Last edited by LeonCarr on Mon Nov 20, 2017 10:13 pm, edited 2 times in total.
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Re: Got started in .300 Blackout...

Postby AndyC » Mon Nov 20, 2017 4:35 pm

Thank you - I'm strongly pondered a shorty pistol-type build too, probably with one of those Shockwave blade-type sto... uh, "stabilizers". The range of bullet-weights and styles with which this cartridge will run is astounding, so I'm looking forward to getting more familiar with it.
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Re: Got started in .300 Blackout...

Postby buzzkill » Mon Nov 20, 2017 5:42 pm

There's a lot of hype around 300 BLK and I didn't want to like it, but then I shot a friend's and had to buy one for myself. It's one of my favorite rifles now. The Primary Arms 3x scope with 300 ACSS reticle is great but even with a basic red dot I was ringing the gong. The only con is ammunition cost and availability but if you reload it mitigates that problem.

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Re: Got started in .300 Blackout...

Postby Bitter Clinger » Mon Nov 20, 2017 6:11 pm

I sense a .300 Blackout range day forming...

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Re: Got started in .300 Blackout...

Postby stroo » Mon Nov 20, 2017 8:29 pm

Probably my favorite gun to shoot right now is a 300 Blackout AR pistol I built about a year ago. I usually shoot it from a cheek weld.

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Re: Got started in .300 Blackout...

Postby RogueUSMC » Tue Nov 21, 2017 1:06 pm

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I like mine...
A man will fight harder for his interests than for his rights.
- Napoleon Bonaparte
PFC Paul E. Ison USMC 1916-2001

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Re: Got started in .300 Blackout...

Postby AndyC » Tue Nov 21, 2017 5:07 pm

Can't see the pic, Rogue.

I've decided to try out the Primary Arms 1-6x24 300/7.62 scope with chevron reticle - I'll wait till the Black Friday sales and see if anyone has a good deal.

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Jago668
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Re: Got started in .300 Blackout...

Postby Jago668 » Tue Nov 21, 2017 11:10 pm

Bitter Clinger wrote:I sense a .300 Blackout range day forming...


I'll be able to join that in about a year. Just mailed my stuff to the ATF today to build one as an sbr.
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Re: Got started in .300 Blackout...

Postby Bitter Clinger » Tue Nov 21, 2017 11:33 pm

For my 10.5" BBL pistol, I went with the Primary Arms 3X Compact Prism Scope with the 7.62X39/300BO ACSS Reticle. The reticle is useful for both supersonic and subsonic.

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Re: Got started in .300 Blackout...

Postby The Annoyed Man » Tue Nov 21, 2017 11:45 pm


That’s the primary reason I chose a 10.5” barrel for my .300 Blk SBR. According to the reading I did before buying, the cartridge is more or less optimized for that length - whether you’re shooting subs or supers. I had originally considered a 10.5” 5.56 barrel for an SBR.....and may do one yet, now that the SBR is already registered....but then I started investigating .300 Blk, and decided to do that caliber instead.
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