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Thread: Cast 5.56 in ar

  1. #1
    Expert freekforge's Avatar

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    Cast 5.56 in ar

    Anybody having luck loading cast and powder coated 5.56 for use in an ar15? I enjoy reloading as much as I do shooting so I don't mind the tinkering that comes with making it work in a gas gun. I had a buddy that loaded some just to say he did so I have some data to take into consideration. I have a 55gr. Lee mold coming tomorrow and I have a little bit of lyman #2 in the garage. The lyman book listed 1680 and imr4227 which I keep on hand for my 300blk loads.
    The rifle is the keystone of democracy

  2. #2
    Grandmaster red_zr24x4's Avatar

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    Nothing to add except, watch your speed, might need to put a gas check on it
    "Courage is Being Scared to Death, but Saddling up Anyway" - John Wayne
    INGO# 3207

  3. #3
    Grandmaster Leadeye's Avatar

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    30 caliber is as small as I've gone with cast. I'll be curious to hear your results.
    Where's the Kaboom? There was supposed to be an earth shattering Kaboom.

    Marvin the Martian

  4. #4
    Expert freekforge's Avatar

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    I have a box of gas checks coming later in the week I'm going to ladder test the various powders with and without gas checks. I've cast a lot of .30 cal for the 300blk and 30-30 and this is the smallest I've gone as well. I'm also interested in the long term effects it may have on the gas system so if I get a decent load worked up I'm going to shoot a bunch out of a ptac upper without cleaning the gas system just to see if I have and lead or powder coat build up
    The rifle is the keystone of democracy

  5. #5
    Grandmaster Leadeye's Avatar

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    110 grain 30 Mauser and 170 grain 30-30 are the smallest I've run, the 30-30 was gas checked. I've loaded 100 grain 32s, but that's easy, no speed there.
    Where's the Kaboom? There was supposed to be an earth shattering Kaboom.

    Marvin the Martian

  6. #6
    Midnight Rider

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    Gas checking was really important on the limited amount of 300BLK that I have cast/coated/loaded. The 130gr boolits with gas check ring shot just fine without gas checks, but they patterned like a shotgun. Grouped much better with the gas check. Grrr, 3 cents a piece.
    -----------------------------------------------
    Done, done, and Iím on to the next one...
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  7. #7
    Expert freekforge's Avatar

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    The only cast load i used in the 300blk were subsonic 230grain and 180 grain so I didn't use a gas check with them. The mold came in right as I was leaving for work. I have to bring our new wood lathe in the garage and get it setup tonight, hopefully I will have time to cast a hand full before bed.
    The rifle is the keystone of democracy

  8. #8
    Marksman

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    All I run through my M1 Carbine is 120 grain lead with a gas check, lubed with liquid Alox. No issues after thousands of rounds.

  9. #9
    Expert freekforge's Avatar

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    Shot 20rds today they grouped ok but had to be cycled manually. I'm going to bump up the charge and try again.
    The rifle is the keystone of democracy

  10. #10
    Grandmaster Leadeye's Avatar

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    Gas check or plain base?

    Where's the Kaboom? There was supposed to be an earth shattering Kaboom.

    Marvin the Martian

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