13 responses

  1. Cary Kieffer
    July 17, 2013

    Thanks Michael and Lonnie for clearing that up for me. Mike, looks like you got a winner of a topic here. Lots of interaction on it. That’s great. I’ll be staying tuned to this one.

    Reply

    • Michael Reyneke
      July 17, 2013

      Good luck with your Blackout adventures!

      Reply

  2. Michael Reyneke
    July 17, 2013

    Cary, to answer your questions:

    1. The Blackout seats nicely in any AR magazine just as well as 5.56×45. No complaints from what I have seen.

    2. The 300 Blackout is known to cycle the best in ARs with pistol length gas systems. Bolt cycling IS a known problem, but it all depends on the ammo (subsonic vs. supersonic) and the ‘heaviness’ of the buffer. Most guys will load their own ammo and shoot with lighter buffers to prevent cycling problems. Subsonic ammo runs well in pistol ARs and SBRs, but doesn’t have enough energy to cycle the bolt on the longer gas systems.

    Supersonic loads will cycle in any gas system because there is enough energy. If you plan on hunting big game with the 300, use supersonic. Subsonic doesn’t have enough power to take down the target.

    Reply

  3. Elliot
    July 17, 2013

    @Cary – I feel the same way. I keep hearing about the 300 but have yet to see anyone do a comparison test.

    Reply

  4. chad
    July 17, 2013

    why go thru the trouble of loading 7.62×39 subsonic?

    Reply

  5. Lonnie
    July 17, 2013

    I have heard it said many times the 300 is like a semi-auto 30-30. The advantage over the 7.62×39 is they use all standard AR parts except for the barrel of course. They are very easy to quiet. 180-220 grain or you can shoot without a can with 120-165 grain very nicely. Another advantage over the 7.62×39 round is for the re-loader. The 300 can be made very easily out of 223 brass using small rifle primers. 223 brass is very easy to get your hands on not to mention there is a large about of bullets and load data available for the 300 as compared to the 7.62×39. Just my two cents.

    Reply

  6. Michael
    July 17, 2013

    I wonder whether there is a practical difference between a subsonic ~220 grain 300 BLK and a subsonic ~230 grain .45 ACP. If they are traveling at around the same speed with the same weight at a distance that doesn’t significantly change that (such as 50 yards), how is 300 BLK better than .45? Obviously there are differences in the guns shooting them (AR vs pistol-caliber carbine), I’m more curious about the caliber itself.

    Reply

  7. Ballistic6
    July 17, 2013

    I am not a “cartridge hater” per se, but I do agree with the assessment attributed to them. At the end of the day, the cartridge has done exactly what it was supposed to do… Make money for its corporate developers and proponents by wedging yet another un-needed caliber into a stupidly crowded market. There will always be the gear-queers, fanbois and caliber geeks who will buy whatever the new gee-whiz, cool toy they see in the glossy gun rags who make their money from ad dollars. As long as those guys exist, people will keep trotting out new (underwhelming) calibers and pimping them like they are gold.

    Reply

  8. Cary Kieffer
    July 17, 2013

    I’m looking forward to seeing what you think! Especially since I have gotten into suppressors. So far only 22’s but I intend to get more cans (from Barry) and I would assume a can for my 308’s would work with this cartridge too.

    I do have 2 simple questions maybe you will cover later…
    1. Does this cartridge fit in a regular AR mag?
    2. Will the suppressed loads cycle a regular AR rifle with no modifications for it?

    Thanks Mike looking forward to this series! Great topic.

    Reply

    • Michael
      July 17, 2013

      @Cary:

      1) Yes. The cartridge is a 5.56/.223 cartridge that has been necked up and shortened with the same OAL as the 5.56/.223. This was done intentionally so the only change to existing AR’s would be swapping out the barrel.
      2) As far as I’ve seen, yes it will. There is still a significant amount of energy going down the barrel that AFAIK it will still cycle.

      If the price of 300 BLK ammo comes down significantly, I would seriously consider getting one myself.

      Reply

    • Lonnie
      July 17, 2013

      Yes the 300 will fit in standard AR mags and uses the same bolt as the .223/5.56. All parts are stock except for the barrel. You will need a 300 barrel and they are getting to be readily available.

      Reply

  9. Mike Coker
    July 17, 2013

    Cary, one goal of this series is simply my personal curiosity about the cartridge. There is so much hype over it. There were giant “BLACKOUT!!!” signs all over NRA Houston.

    Reply

  10. Cary Kieffer
    July 17, 2013

    I might be one of those cartridge haters to a certain extent but keeping an open mind I am interested to see the rest of this series. I don’t know diddly about this cartridge but I have heard it said that you can do anything the 300 can do with a properly loaded 7.62×39…Is this true?? Seems like if it is that the components would be easier to find. Just wondering? Thanks.

    Reply

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