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Thread: 300 BLK Discussion
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31 August 2017, 17:14 #31LEO / MIL
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Pistol is the way to go. I have a 16" carbine gas and it was a total PITA to get it to run reliably. Part of that is the bbl manufacturer I'm sure, and I bought it when the round was pretty new and bugs were probably still being worked out, but unless you plan on only shooting supers, stick to pistol length. I have a 10.5" Noveske barrel with pistol length gas and haven't had any issues with it, other than getting the damn gas block pin in.
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31 August 2017, 19:18 #32LEO / MIL
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I run a 9", and an adjustable gas block isn't necessary for subs or supers. The 300 is a perfectly capable SD or meat round, however, using subs for anything or than plinking and fun isn't really smart. I've even thrown in a titanium BCG and still have yet to experience any issues.
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13 November 2017, 02:31 #33
It will be interesting to see how the new Hornady 190gr stuff works. They're claiming a subsonic load that passes FBI protocols. Price is supposed to be about $22-$23 a box.
https://www.hornady.com/ammunition/r...-x-subsonic#!/
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13 November 2017, 06:06 #34
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13 November 2017, 07:13 #35
I’d keep an eye on this company too. https://discreetballistics.com/product-category/300blk/
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13 November 2017, 09:13 #36
Yes. Very much so. It would be even more awesome if they sold expanding bullets as reloading components.
I will be looking at that too. Passively of course (for now).
I looked before at expanding subs and the price was way too much among other things.
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11 May 2018, 15:26 #37
Reviving an old thread... I finally took the plunge and built a .300BLK upper to match my existing SBR. I saw most of the components on sale, some for really cheap so I said why not. Plus I have a Recce 7 that hadn't been shot before a few days ago.
Parts I used:
Ballistic Advantage 9" barrel (about hundred bucks delivered)
CMT UPUR 3 (about $115 delivered)
SLR 8.3" handguard and an adjustable block. (I got something like 20% off everything)
I have a SNACH charging handle and a few extra BCG but for now I am just swapping everything off my 10.5" 5.56. The optic on top is a T2.
Basically I let curiosity get the better of me but so far I kind of like it.
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I went shopping for various grain weight and types of ammo. I found some BECK Ammo on the shelves, I never heard of them before but they had the Leighigh Defense Max Expansion on the shelves but the price was mismarked. I bought two boxes of it for $17 each out the door. I haven't shot any of that yet but I know it normally goes for $40 about, per box.
I bought some of their other ammo too and so far I can say it's pretty good stuff. I got some 220's and some 110 TSX as well as some other brands of mid weight supers.
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I got the gas block dialed in. I will only be shooting suppressed for this gun. On gas block setting 6 (out of 15) my gun will cycle supers and subs and will lock the bolt back.
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So far though it seems like the 300 BLK supers within 100 yards are knocking the crap out of the plate. It would certainly F something up in that 100 ish yards (and in) range.
The supers are LOUD even with a suppressor. Just as an experiment I stupidly tried to test how loud a single round would be. Needless to say I won't do that again. It really wasn't the gun or the suppressor, it was the sonic crack happening 2 feet from your face that was really unpleasant.
The subsonics were easily hearing safe. I think the ammo I have is loaded a bit stout but it's still ok. I am going to try various stuff and compare before I start reloading. I am not sure how light of bullets I can load subsonic and it still run the firearm.
What I want to do though is compare 5.56 out of a 10.5 SBR and 300 BLK out of a 9" and see how much energy I get within 150 yards. Basically do a side by side SBR comparison.
So far with my very limited amount of shooting though I kind of like it. Who knows, my impressions may change after I get 1000 rounds down range. Comparing the 300 BLK to a 7.62x39 would also be interesting information to learn about.
Overall though so far I like it.
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11 May 2018, 15:47 #38
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11 May 2018, 16:00 #39
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11 May 2018, 16:09 #40
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11 May 2018, 16:32 #41
It wasn't THAT bad. On my right ear it was fine. On my left ear though it was definitely uncomfortable. Like I said, it wasn't the gun. It was the proximity to the sonic crack out of such a short barrel.
None the less that was my 'hey bubba watch this' moment for the year.
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12 May 2018, 05:03 #42
So, related, but OT, what's a relatively quiet (-ish?) Off-the-shelf round for .223/5.56? I know the key to taming the noise level on my blackout is grams; no such solution for the smaller pill, so is there a "less noisy" alternative that us non-reloaders can take advantage of?
There's no "Team" in F**K YOU!
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12 May 2018, 07:47 #43
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12 May 2018, 08:30 #44
Auto correct fuck up. GRAINS.
There's no "Team" in F**K YOU!
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12 May 2018, 09:16 #45
For off the shelf ammo I have no idea but I might be able to shop around. I did my own testing a long time ago and developed a 55gr load that gets the same velocity out of my 10.5 as factory ammo but I can get off one or two rounds without it ringing my ears at all. I personally think it's quieter for a pud plinking load. Even with that though if I was going to shoot a mag of it I would definitely wear ear pro.
Without going extremely nerd on you it would be a mile long post. The type of powder matters probably the most, the bullet design matters too.
I would think your best bet for off the shelf is the Hornady 75 grain SBR ammo.
https://www.gtdist.com/hornady-5-56n...-sbr-75gr.html