300 Blackout Upper

Discussion in 'AR-15 Discussion' started by ShagNasty1001, Nov 30, 2012.

  1. ShagNasty1001

    ShagNasty1001 New Member

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    Well if y'all have seen recently, I just finished, halfway at least, my lower build (I just need a stock and buffer which I'm ordering later tonight when I get paid) and I have finally decided on my upper caliber being a 300blk due to the fact I have an @ss load of .223 casings and .30 caliber bullets from .308 reloading. My only question is which brand? I want a 16" barrel, preferable without the A2 sight but I am not opposed to it being on there if the price is right. I have looked around and have seen them all ranging from 400 or so to 1100 for just an upper. Some of the cheaper ones were from J&T Distributing, Model 1, and Marks Armory. I have also seen a bunch of CMMG's but they are out of stock in all the places I have looked. What do you guys recommend?
     
  2. brettc

    brettc New Member

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    I saw that PSA had their 16" 300 blk uppers back in stock, might want to give them a look. Good luck
     

  3. oldpapps

    oldpapps New Member

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    Remember to balance.
    16 inch barrel - carbine gas - carbine buffer.
    One of the shorter barrels - pistol length gas - pistol buffer.

    If you are going to suppress, that too will come into play. The 'subs' need lots of gas and sometimes the gas port has to be opened up.

    I don't do 'SBR' or 'suppressed' (I don't even waste my time with heavy quieter loads, the 300 is less noise in super-sonic loads, my daughters opinion) and these are the high point capabilities of the 300 AAC Blackout. Guess I missed the boat :)

    Cutting down .223/5.56 brass is simple and easy.

    Your bullet choice reportedly can be a problem. I've never had any problems but I stick with what is proven. I run 110g V-Max, 148g GI FMJ pulls and 150g JSP Corebonded (cheap and not cheap). I do have and tried some of those OTM bullets, $ with little use for me. The standing view is for longer bullets, not short stubby round nose. I've never tried any, so I don't know.

    Powder selections are plentiful. Mostly any large bore mag pistol powder works. Some faster rifle powders are used and some pistol powder for sub-sonics. I use H110/296, Lt'Gun and some old Olin 630. The 630 runs better with heavier, 147/150grain, bullets. The H110/296 with the 110grain and Lt'Gun does well with all. This is all just my opinions, so try what you have and make your determinations.

    Now to your question: everything looks to be in short supply. Check lots of suppliers and makers. See what and when 'it' is available. I bought a DSA 16in SS upper and am very happy with it. It took forever to get! PSA has had a good turn-a-round for me in the past (not for a 300 BlackOut barrel/upper but for .223/.223W/556 uppers). Look around and see. Be safe.
     
  4. X-mark

    X-mark New Member

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  5. ShagNasty1001

    ShagNasty1001 New Member

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    Awesome info, great to know! What about barrel twist rates? I am kinda stuck with a 16 inch since I cant do the SBR and run suppressed like I'd like to since I'm not 21... stupid laws.. anyways, the most common I've seen are 1x7 and 1x8. I plan to run no heavier than 168 grain bullets and will probably stick to 150 range
     
  6. ShagNasty1001

    ShagNasty1001 New Member

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    Sweet! I will definitely be keeping you in mind since the AAC and CMMG are more in my price range!
     
  7. X-mark

    X-mark New Member

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    5% off isn't much, but it will help some. Check my sig line for the coupon code.
     
  8. oldpapps

    oldpapps New Member

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    " ShagNasty1001
    .... What about barrel twist rates? I am kinda stuck with a 16 inch since I cant do the SBR and run suppressed like I'd like to since I'm not 21... stupid laws.. anyways, the most common I've seen are 1x7 and 1x8. I plan to run no heavier than 168 grain bullets and will probably stick to 150 range "


    The 1 in 7 and 1 in 8 twist will handle most everything. The mag well limits bullets weighting more than 240/260 grains or so. I don't do cast bullets, this is just what I remember seeing here and there.

    I will not comment on stupid laws.....
     
  9. ShagNasty1001

    ShagNasty1001 New Member

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    So either twist will be fine? I may make a load of 220 grain subsonic just to see how they are in accuracy as well. Most of the CMMG's I've found were 1x8 and the AAC were 1x7. Would the 1x8 be okay with the 220's out to about 300 yards? That's my max range where I usually hog hunt (the main purpose of this rifle besides the caliber intriguing me). Most of my shots are going to be inside 150 though. I can comprehend the twist rates for .223/5.56 just fine but this is all new territory for me.
     
  10. ShagNasty1001

    ShagNasty1001 New Member

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    Any discount is helpful and is much appreciated
     
  11. oldpapps

    oldpapps New Member

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    "ShagNasty1001
    I may make a load of 220 grain subsonic just to see"


    My barrel is a 1 in 8 twist. When I was starting, I loaded up 20 round of 220gr round nose and H110 powder. I didn't even clock them. I wasn't overly impressed. Not that they didn't shoot well, just not what i was wanting, too much arch. I was playing with scopes at the time and as I remember I was in/around a 6 inch spot at 100 yards. As I was more interested in pressures and function, for me that was very acceptable. My loading was giving pressure signs some/most of the time and I was more interested in that. I dug two slugs out of the log back stop I had at the time.
    http://www.firearmstalk.com/forums/attachment.php?attachmentid=72404&stc=1&d=1354330345

    So, yes 220grain bullets should stabilize with a 1 in 8 twist.
     

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  12. msup752

    msup752 New Member

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    1/8 will work fine for 300 BO. Some people running a lot of subs or even heavier than 220 grain bullets may want or need 1/7.


    I have a PSA upper and it was around $600 with out BCG but I had added extras like a more expensive quad rail. I have shot super and subsonic factory rounds and reloads and it has functioned flawlessly. I do not have a suppressor.
     
  13. ShagNasty1001

    ShagNasty1001 New Member

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    Awesome to know. I probably won't run 220s much unless I get the best groups out of them. And thanks to Car54 showing me a website and link with reviews, I think I am going to go with a SOTA. They seem reasonably priced and from what I've read, people are very happy with them. Now to optics, are there any low-mid powered scopes specific for this caliber? I'm at a three way stop sign on which way to go. Either full scope, a red dot and magnifier or ACOG. I know that Trijicon doesn't have one compensated to this caliber unless that's changed in the last few days when I last looked. Price on this isn't much of an issue so I'm open to whatever.
     
  14. KingTiger

    KingTiger Member

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    Leatherwood/Hi-Lux has a reasonably priced 1-4x with a 300 BLK/7.62x39
    calibrated reticle.

    http://www.300blktalk.com/forum/viewtopic.php?f=151&t=81098

    I have the original CMR scope with the generic BDC on my 9.5" upper & it works fine. I zeroed it with the 115 gr. UMC, then figured out how many clicks up I needed for the 220 gr. subs. Any other rounds should fall between those two.

    Mine has the lighted green reticle. It contrasts quite well with a red LED light I use for night hunting.
     
  15. ShagNasty1001

    ShagNasty1001 New Member

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    I'll have to look into those. What about the Eotechs? I have never actually shot a weapon with one on them
     
  16. ShagNasty1001

    ShagNasty1001 New Member

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