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.30 cal AR-15

Twowings2UTwowings2U Member Posts: 90 ✭✭
edited June 2013 in Ask the Experts
.300 nighthawk ?? is this correct name for cut-down 223 cases swaged down to 30cal??---if so, where's some loading data?? TIA (thanks in advance)
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Comments

  • AnonymouseAnonymouse Member Posts: 4,050
    edited November -1
    You probably mean .300 Blackout. Load data is all over the internet.
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  • MFIMFI Member Posts: 7,899 ✭✭✭
    edited November -1
    300 Blackout it is !!!
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  • rufe-snowrufe-snow Member Posts: 18,650 ✭✭✭
    edited November -1
    Their not 223 cases swaged down to 30 caliber. The original brass was made from 221 Remington Fireball brass that had been reworked to take a 30 caliber projectile.

    This was done by J.D. Jones who originated the cartridge. He called it the 300 Whisper. With the surging interest in the Whisper/Blackout the ammo companies are making the brass commercially available. It's not necessary to convert 221 Fireball brass any longer.
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  • nononsensenononsense Member Posts: 10,928 ✭✭✭✭
    edited November -1
    quote: is this correct name for cut-down 223 cases swaged down to 30cal??

    As stated, the original .300 Whisper cartridge was developed by JD Jones and kept proprietary for all these years. This was the .221 Fireball necked up to take .30 caliber bullets ostensibly for subsonic suppressor firearms. Most of us got around this stupidity by ordering .30-221 Fireball dies and loading for ourselves.

    AAC (with a couple of very minor changes to the case) released the .300 Blackout along with a rifle in which to shoot it. But because of the poor anticipation of demand by AR15 shooters, the ammunition and component manufacturers weren't ready for the demand and public once again resorted to wildcat rigging their own cases by cutting down and necking the .223 cases which were extremely available and cheap at the time.

    I think I have about 3,000 of these cases still on hand for several projects underway.

    Best.
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  • tsr1965tsr1965 Member Posts: 8,682 ✭✭
    edited November -1
    There are a couple other 30 caliber cartridges that were designed with the AR-15 platform in mind, also.

    One would be the 30 AR Remington, and the other is the 300 OSSM. The prior was designed as a new cartridge platform, to give better ballistics than the 6.8 SPC, and 7.62x39.

    The 300 OSSM, approximates the ballistics of a 30-06, with bullet weights up to 165 grains, from what I understand.

    Unlike the 300 Whisper/Blackout, the bolt has to be changed for these, as does the magazines. That is something that is afforded by the 300 Whisper/Blackout, that I do not see mentioned in the above postings, that you only really have to change the barrel(or upper is the easiest way) for these, and you can use standard magazines.

    Best
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