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  1. #11
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    Default Re: 300 AAC BLACKOUT (7,62X35)

    Quote Originally Posted by krieger View Post
    Its new?

    All they did was duplicate the old German 7,92x33 ballistics for the STG44 in a 7,62x35 cartridge.

    They both fire a 125g bullet at 2250fps. I ran it through me Norma ballistics program, they are 99.8% the same.
    I am confused - is there another 7,62x35 cartridge?

    SAAMI registered the 300BLK/7,62x35 as a new cartridge.

    I said it is a "new" "cartridge" I did not mention ballistics.

    If you have an issue with the 300BLK as a newly registered SAAMI spec cartridge I suggest you take it up with AAC?

    Imo it is more similar to other cartridges than to the 7,92x33 but that does not mean it is not new.

  2. #12
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    Default Re: 300 AAC BLACKOUT (7,62X35)

    The 300BLK is not a new cartridge it has been around fow years But called By other names (300/221 or 300whisper )
    The 300BLK name was used to get away from patent rights which JD JONES holds . But is the first to be picked up and run as a comercial cartridge by major companys .

    The 300 whisper has been around for years in the Silouette shooters in SA and holds many records .

    I Buildt a 300 whisper Last year om an AR15 (my zombi hunter ) and it is one of my favorit Rifles because of its versatility as stated in previous posts .

    I got a case of 300AAC blackout from remington for test and it shoots ausom in my Rifle with around 26 mm 5 ahot groups at a 100m

    The ammo is not cheap yet because it is new on the market but is great brass so i can reload it quite a few times

    ---------- Post added 28-10-2011 at 00:12 ---------- Previous post was 27-10-2011 at 23:53 ----------


    Last edited by The Viking; 27-10-2011 at 23:56.

  3. #13
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    Default Re: 300 AAC BLACKOUT (7,62X35)

    It is a matter of opinion how we see the issue isn't it?

    Is the glass half full or half empty?

    We can play around with the word "new", "same" and "similar" for days.

    The 300BLK is the same as the 300Whisper like the 223 is the same as the 5,56x45. They can both be fired in the same chamber but there is still a technical difference.

    Imo it is not the same it is similar. Afaik the case of the 300BLK is about .013 longer than that of the 300 Whisper. There is a throat difference. If you want to ignore the technical difference and say it is the same then you are welcome.

    It is new as a SAAMI spec cartridge being produced commercially with the vision of having it freely available to commercial users in factory produced form. Imo this is going to influence the future of this cartridge/round together with the fact that the only change needed for it to work on an AR platform rifle is the barrel and gas port in the barrel.

    I am not going to belabor this point. If you still say it is not new that is your opinion.

    Seeing it as new SAAMI spec commercial cartridge is my opinion.
    Last edited by DS; 28-10-2011 at 08:04.

  4. #14
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    Wink Re: 300 AAC BLACKOUT (7,62X35)

    I am just glad i can get factory ammo for a fantastic cartridge .

    I think this is defenatly the way forward for the AR platform due to its great balistics and versitilty from light bullets to heavy thumpers . this is what most people have always wanted in a combat rifle Eg : 30 cal to fit in an small action with high capacity ,

    Just hope you guys can get rifles and ammo for it .

    And yes it is a new commercial cartridge from SAAMI point of view and due to the small changes which had to be made to get away from patent rights

  5. #15

    Default Re: 300 AAC BLACKOUT (7,62X35)

    Quote Originally Posted by The Viking View Post
    The 300BLK is not a new cartridge it has been around fow years But called By other names (300/221 or 300whisper )
    The 300BLK name was used to get away from patent rights which JD JONES holds . But is the first to be picked up and run as a comercial cartridge by major companys .
    I am the project lead on 300 BLK at AAC. JD had no patent. The cartridge was not "changed" so much as it was a 300-221 finished to be ready to submit to SAAMI. For example, the throat was made the correct length for a Sierra 220 MK loaded to mag length, the headspace datum was moved to not fall on a radius, and the neck was made to accept 223 brass without neck turning.

    http://www.youtube.com/watch?v=a_OiTH0mZLs

    http://bulletin.accurateshooter.com/2011/10/horner-wins-tactical-optics-divison-at-multigun-nationals/

  6. #16

    Default Re: 300 AAC BLACKOUT (7,62X35)

    Quote Originally Posted by rsilvers View Post
    I am the project lead on 300 BLK at AAC.
    Welcome , glad you found us.

    Wont ypu please post an intro , just a bit more about yourself. http://www.gunsite.co.za/forums/foru...-Introductions
    "Guns are just tools, the way they're used reflects the society they're apart of, if you don't like guns, blame it on society" ~Chris Kyle

  7. #17

    Default Re: 300 AAC BLACKOUT (7,62X35)

    Full power 123 grain ammunition matches the ballistics of the 7.62x39mm AK
    I don't get it. Firstly, I'm not sure that the AK 7.62x39 is exactly an optimal benchmark of ballistic performance. Secondly, if that is in fact the case, well why not just chamber it for that cartridge which is already pretty much universally available already? Why seemingly reinvent the wheel?

    What am I missing? Khumba?

  8. #18
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    Default Re: 300 AAC BLACKOUT (7,62X35)

    Quote Originally Posted by Wanderin' Zero View Post
    I don't get it. Firstly, I'm not sure that the AK 7.62x39 is exactly an optimal benchmark of ballistic performance. Secondly, if that is in fact the case, well why not just chamber it for that cartridge which is already pretty much universally available already? Why seemingly reinvent the wheel?

    What am I missing? Khumba?
    There are / were quite a few reasons for not messing with the 7.62x39, WZ, (which has been tried many times on the AR platform and never worked well) including these...

    Extreme cartridge taper
    - Reduces reliability of feeding in AR Magazines
    - Reduces Magazine capacity
    - Cartridge taper induces considerably higher bolt thrust-
    exacerbating the AR Bolt’s weaknesses
    - Requires a larger Bolt Face which reduces Bolt Locking Lug strength-
    exacerbating the AR Bolt’s weaknesses
    Limited projectile selection
    - 0.311″ diameter not a common option in most modern bullets
    Source: Defense Review
    Run Fast, Bite Hard!

  9. #19
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    Default Re: 300 AAC BLACKOUT (7,62X35)

    Quote Originally Posted by Wanderin' Zero View Post
    I don't get it. Firstly, I'm not sure that the AK 7.62x39 is exactly an optimal benchmark of ballistic performance. Secondly, if that is in fact the case, well why not just chamber it for that cartridge which is already pretty much universally available already? Why seemingly reinvent the wheel?

    What am I missing? Khumba?
    The 30 cal bullet has more energy downrange than the 5,56 but putting the .308 Win into an AR platform makes for a bigger, bulkier, more recoil and heavier Rilfe and that is not the point of the AR15 as a light and fast handling assault rifle. The practical use max distance is not comparable to the 308 but that was not the intention when the 300BLK was designed/optimised for use in the slr AR15 platform.

    So putting a 30cal bullet into a cartridge that wil work in the standard AR15 platform is the next goal. The 7,62x39 delivers more energy than the 5,56 so it seems a good idea to me to get a 30cal cartridge that works in the AR15 platfrom and that is similar or better in performance than the 7,62x39.

    The 300BLK is ultimately more versatile when it comes to subsonic loads than the 5,56 and 308 and 7,62x39 and with the lighter bullets and correct supersonic loads it a very effective cartridge in terms of terminal balistics.

    The 7,62x39 cartridge cannot be utilised efectively and reliably in the standard AR magazine due to the tapered case profile. To design a proprietary magazine for the 7,62x39 to work in the standard AR lower is obtuse imo. To modify the AR receiver to accept the AK 7,62x39 mag results in a new lower for the AR - refer to the Knights Armament SR-47.

    The 300BLK can be used in the AR15 platform with only one change to the rifle = barrel chambered in 300BLK. The 300BLK uses all the same components of the 5,56 AR except for the barrel.
    Last edited by DS; 26-12-2011 at 07:32.

  10. #20
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    Default Re: 300 AAC BLACKOUT (7,62X35)

    Posted by RSilvers on 300BLK Talk:

    Lapua 123 grain 7.62x39mm - 712 Joules at 300 meters (16.5 inch barrel). This is 525 ft-lbs.

    http://www.lapua.com/en/products/specia ... e-rifle/19

    Remington Match 125 grain 300 AAC Blackout - 618 ft-lbs at 300 meters (16.0 inch barrel (0.320 BC, 2215 fps muzzle velocity)).

    Advantage - 300 AAC Blackout by 16%, even with slightly shorter barrel.

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