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Thread: How many times do you anneal for 5.7 to .308?

  1. #1
    Boolit Buddy

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    How many times do you anneal for 5.7 to .308?

    I annealed once after opening up the mouth, tumbled with ss pins, then drew them down to .305. I then annealed one more time to finish the swaging.

    Could I skip the second annealing?

    Thanks for the wisdom from the smartest most accurate bunch of men in the whole cast boolit forum

  2. #2
    Boolit Master

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    just wash good and anneal once, doing it twice does not accomplish anything but waste your time. personally I dont like the pins at this stage, just citric acid and dawn, I use pins on the final product.
    if you are ever being chased by a taxidermist, don't play dead

  3. #3
    Boolit Master
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    But does the brass work harden when sized down?
    QUIS CUSTODIET IPSOS CUSTODES?

  4. #4
    Boolit Master

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    I take 380 down to 357 and no problems.
    if you are ever being chased by a taxidermist, don't play dead

  5. #5
    Boolit Master



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    The base diameter of the 5.7x27 is 0.313 inches. Sizing it down for jackets will reduce it only 0.006. You only need one good annealing.

    Neck is a different matter. Taking the neck up to an outside diameter of ~ 0.307 will result in neck splitting if not adequately annealed. (You will loose 15% to 35% of cases due to neck splits if you do not anneal in my experience from early work I did with making 5.7 into .30 caliber jackets.

    I only anneal once and do not have any problems with nose forming an 8S Ogive on my 175 grain bullets I make with 5.7 Brass. Just make sure you get a full anneal on the brass when you do it once.

    +1 on a good ultrasonic citric acid cleaning on 5.7 cases. I do not worry about tumbling "For Appearance" after the bullet is formed. They "Look Good" if you do a final Shine Finish after making them; but they do not shoot any different.
    Last edited by MUSTANG; 08-09-2020 at 05:34 PM.
    Mustang

    "In the beginning... the patriot is a scarce man, and brave and hated and scorned. When his cause succeeds, the timid join him, for then it costs nothing to be a patriot." - Mark Twain.

  6. #6
    Boolit Buddy

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    Do you all have a mold that has tapered cores? I made a mold with straight cores. I cant push the core in evenly without really, really horsing down on the handle. there are empty spots in the jacket after core seating. when I torch the core inside the jacket and melt it, it seats easy and fills out to .306.5" very nicely.
    What is the best and easiest way to deal with this problem?

    thanks

  7. #7
    Boolit Master

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    My core mold is cut with a 1/4" drill.
    The 118 degree point goes in first.
    The diameter is small enough, the wall thickness near the web of the 5.7 case/jacket is not a problem.
    To lazy to chase arrows.
    Clodhopper

  8. #8
    Boolit Master



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    I cast a straight core at .215" diameter. I then swage to .225 diameter to achieve consistent weights. I then swage into the 5.7 Jacket. None have a taper.
    Mustang

    "In the beginning... the patriot is a scarce man, and brave and hated and scorned. When his cause succeeds, the timid join him, for then it costs nothing to be a patriot." - Mark Twain.

  9. #9
    Boolit Buddy

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    Quote Originally Posted by MUSTANG View Post
    I cast a straight core at .215" diameter. I then swage to .225 diameter to achieve consistent weights. I then swage into the 5.7 Jacket. None have a taper.
    Mustang, what weight bullets are your end products?

  10. #10
    Boolit Master



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    I swage 175 grain bullets from 5.7 x 28 cases. I get a bit anal on exact weight. When I swage cores to get consistent core weights; I save the small lead thread elected from the core swage die. I then use these (trim as necessary) to bring the bullet up to exactly 175 grains. I weigh the Jacket" and a core; then cut a small extruded wire piece to make it exactly 175 grains. The wire piece goes to the bottom of the jacket and the core inserted on top of the wire so it is at the bullet base and gets swaged into the jacket along with the core and there is no "Weak" point in the bullet.

    my .308 swage bullets are an 8S (ogive). A different Ogive point may result in a slight difference for others.
    Mustang

    "In the beginning... the patriot is a scarce man, and brave and hated and scorned. When his cause succeeds, the timid join him, for then it costs nothing to be a patriot." - Mark Twain.

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Abbreviations used in Reloading

BP Bronze Point IMR Improved Military Rifle PTD Pointed
BR Bench Rest M Magnum RN Round Nose
BT Boat Tail PL Power-Lokt SP Soft Point
C Compressed Charge PR Primer SPCL Soft Point "Core-Lokt"
HP Hollow Point PSPCL Pointed Soft Point "Core Lokt" C.O.L. Cartridge Overall Length
PSP Pointed Soft Point Spz Spitzer Point SBT Spitzer Boat Tail
LRN Lead Round Nose LWC Lead Wad Cutter LSWC Lead Semi Wad Cutter
GC Gas Check