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Thread: 300 AAC Blackout... maybe my new most favorite caliber

  1. #1
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    Default 300 AAC Blackout... maybe my new most favorite caliber

    Blah blah blah... 300 AAC. Blah blah blah 300 Blackout. Blah blah blah 300 Whisper. What is all this talk about this cartridge??? Well, I started to investigate this further and I like what I see.

    History
    The 300 Blackout (also known as the 300 AAC Blackout) was "redefined" by a silencer company called Advanced Armament Corp. The goal was to produce a larger caliber bullet that can be fired from a 5.56x45 AR15 platform. This is not new. Many have tried before. Some have just used the AK round (7.62x39) but failed because the ammo is so tapered that it required special magazines or a modified lower receiver to accept AK mags. Also, the bolt carrier needs to be replaced, as well as the buffer and buffer spring. Then there is the 6.8SPC. Same 5.56 magazine but still needed a heavier buffer and spring, new bolt, AND the recoil was MUCH more than the 5.56. In all three system (5.56, 7.62x39, and 6.8SPC) systems, if you choose to shoot subsonic and/or run a suppressor, you will need to change the gas system to be adjustable (or risk failures).

    Advanced Armament took the standard 5.56 cartridge, cut it down, and renecked it to accept a 30cal bullet. The dimensions are 7.62x35. This way it uses the same magazine, same bolt, same buffer, and same spring. Basically, the only thing you need to change was the barrel. Great! This caliber also allows you to run subsonic ammo without changing anything!


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    Since you are running a heavier bullet (110gr -> 220gr) the bullet drop is more, but the trade off is the amount of energy that is retained by the bullet. A better overview can be seen by watching this video




    Ironically, this caliber "isn't" new. Advanced Armament really didn't invent something new. What they really did was convince a lot of people (and the military) to seriously look at this for combat effectiveness. Once proven, they spun a very well directed marketing campaign to make this bullet more visible to the world... They marketed it to tactical nuts like me.

    The 300 AAC Blackout is pretty much the same as the 300 Whisper. It's wildcat cartridge that was not so popular because due to it's trademark issue. Since Advanced Armament isn't shy about the trademark of this caliber, they pretty much let any manufacturer use it. Because of this, several hundred manufactures have jumped on this bandwagon. From barrel MFGs, scope MFGs, to ammo MFGs, they have lined up to make "something" for this cartridge.

    But why? Is it that much better? I'm starting to think so. It's not a long range gun. For the regular folks, it's a 300 yard gun. It can reach out 500+ yards, but its not practical after 500. Either way, it's a gun that packs a LOT more energy than a .223/5.56. When using a 110-125gr bullet, it can take out a deer. It's not intended for big game like elk. It's not really a hunting caliber... unless you are hunting bad guys. When running subsonic with a 220gr bullet it's energy is outstanding for under 100yd and is quieter than a 9mm (suppressed or not). When suppressed, its decibel rating is more like a exaggerated fart.

    Cost for ammo is more (when you can find it). $13.00/20rnd of 115gr plinking stuff. $20.00/20rnd for 220gr subsonic. $29.00/20rnd for 110-125gr ballistic tip for hunting. That's pricy compared to $8.00 for 55gr FMJ in .223/5.56.

    Finally I had a chance to shoot some 220gr Remington UMC subsonics from a 16" barrel AR. Oh my. The recoil was much less than a .223/5.56 and it knocked the heck out of my steel plate. I was sold. I spent months trying to find ammo. Besides the current ammo shortage, the demand for 300 Blackout ammo has been nuts. Remember the cost? Well, reloading will bring my cost of the 220gr subsonics to under $10.00. Ballistic tips to around $12.00. Now we're cooking with fire! Last month I invested $700 on reloading equipment. This week I built 10.5" 300 Blackout upper for under $400. Yesterday I spent $500 on reloading components.









    I'm well vested in this project. Soon, this may be replacing my dedicated 5.56. Next year (when I replenish my toy fund) I'm definitely going to put a suppressor this one and probably use it as a home defense rifle and pig gun. I will also be filing my Form1 with ATF and registering two more AR lowers to be SBR (short barrel rifle) receivers. This way I can have a shorty 300 Blackout, 9mm, and my original 5.56.

    For those of you that are still on the fence with your AR build. You can buy a 5.56 upper for $270 from DS Arms. This is NOT a bad choice. It's a proven choice for many years. If you are considering the 300 blackout, check out Model 1 Sales. They offer a 300 Blackout upper for $385, minus the bolt carrier and charging handle. If all you have is a stripped lower, you can buy a kit for $550.
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  2. #2
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    Default

    One of the guys from my gym built one and let me shoot it. After I shot it I wasnt sure I liked it. Like you said it wasnt loud and it didnt kick. I didnt know that going into it so I felt like I was shooting a .22 and I was thinking it was going to be more like an reg AR. After I got over that and was able to hit the steel with no problems, I was sold.
    That should make a great pig gun.
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  3. #3
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    why the IMR 4227? most people use H110, A1650 or Lil Gun for 300blk. I also reload for 300blk and am saving my pennies for a can because shooting subsonic without one is just silly. Im working up a hunting round now with 125gr ballistic tips.

  4. #4
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    one thing to look into is the COL of your rounds. There is a rib inside of the AR mags that wants to press on the bigger bullet and can knock it off center. I reload shorter then mag length to avoid that rib. Some people file it down so its a non issue but i'd rather leave everything stock so i can use any mag i pick up and not a 300blk specific one.

  5. #5
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    Quote Originally Posted by ShmUDE View Post
    why the IMR 4227? most people use H110, A1650 or Lil Gun for 300blk. I also reload for 300blk and am saving my pennies for a can because shooting subsonic without one is just silly. Im working up a hunting round now with 125gr ballistic tips.
    As much as I like H110 or Win 296, and Lil' Gun, they are hard to find. Ibwas lucky to find tjis IMR 4227. It works for both super and subsonic.

    The YHM suppressor is the best value I can find. I will use it on both the 300 blackout and my .308 win Armalite AR10 SuperSASS.
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  6. #6
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    Quote Originally Posted by ShmUDE View Post
    one thing to look into is the COL of your rounds. There is a rib inside of the AR mags that wants to press on the bigger bullet and can knock it off center. I reload shorter then mag length to avoid that rib. Some people file it down so its a non issue but i'd rather leave everything stock so i can use any mag i pick up and not a 300blk specific one.
    What is your COL? I did read anout this, too. Are you in AZ? I would love to see your load process and setup.
    _________________
    2009 4-door JK - 85% daily driver, 15% hunting vehicle, 100% fun!

    It's better to be prepared, than scared.
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  7. #7
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    Quote Originally Posted by fatbob309 View Post
    One of the guys from my gym built one and let me shoot it. After I shot it I wasnt sure I liked it. Like you said it wasnt loud and it didnt kick. I didnt know that going into it so I felt like I was shooting a .22 and I was thinking it was going to be more like an reg AR. After I got over that and was able to hit the steel with no problems, I was sold.
    That should make a great pig gun.
    Build it, Bob. Build it!
    _________________
    2009 4-door JK - 85% daily driver, 15% hunting vehicle, 100% fun!

    It's better to be prepared, than scared.
    Mailman by day, Gun Nut by night.
    NRA Certified Instructor - 5 disciplines.

  8. #8
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    Quote Originally Posted by 2ndchance View Post
    What is your COL? I did read anout this, too. Are you in AZ? I would love to see your load process and setup.
    yeah, im local. North Mesa area. My reloading setup is pretty miniscule compared to some. Im using a Lee turret press, lee 300blk dies with crip, Digital scale from cabela's, lyman tumbler, home made case lube, CCI primers, 208gr hornady match bullets and 125gr ballistic tip for a hunting round.

    My COL is 2.060 if i remember right off the top of my head with the 125gr supersonic. I went mag length on the subs i was shooting with a buddies can 2.260 i think.

  9. #9
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    Nice and simple! I've been loading straight wall stuff since 1994. Bottlebeck stuff is new to me.

    I'm running a Dillon RL550 with 5 quick change heads. Reciently I bought a RCBS single stage.

    Are you using the lanolin/alcohol mix for your lube? That's my next thing. I have to find a source for pure lanolin. Safeway has the alcohol.
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    It's better to be prepared, than scared.
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  10. #10
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    Quote Originally Posted by 2ndchance View Post
    Nice and simple! I've been loading straight wall stuff since 1994. Bottlebeck stuff is new to me.

    I'm running a Dillon RL550 with 5 quick change heads. Reciently I bought a RCBS single stage.

    Are you using the lanolin/alcohol mix for your lube? That's my next thing. I have to find a source for pure lanolin. Safeway has the alcohol.

    yep, i called around and found the lanolin at health food stores. I have a sprouts right down the road from me and they had it. It separates pretty bad when it sits so you just have to remember to shake it up before you spray your brass. I sized 50rds just to see how it worked and it was perfect. Tumbled after to clean them and they were nice and shiny.

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