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Thread: 200 gr 300 Blackout

  1. #1
    Boolit Master



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    200 gr 300 Blackout

    Has anyone tried to make a 200 gr projectile for 300 Blackout sub sonic from copper tubing?
    Bill

  2. #2
    Boolit Master

    Reload3006's Avatar
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    Quote Originally Posted by just bill View Post
    Has anyone tried to make a 200 gr projectile for 300 Blackout sub sonic from copper tubing?
    Bill
    A 200gr 30 cal projectile from copper tubing is doable but it would be an awfully long bullet. I’m not sure it would work too well in a 300aac. Copper tubing has a much thicker wall than a standard j4 or Sierra jacket so the lead core diameter is a lot less. So to get the weight it would have to be fairly long. While this wouldn’t be a huge problem in say a 3006 or 300 mag the small aac cartridge could present a problem in my honest opinion.

  3. #3
    Boolit Master



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    That is what I figured, however try to find a jacket to make a 200 is near impossible. I ran.out of suppliers and guesses a while ago. My RCE jackets almost get it, however they may reach with a round nose.

    Looks like I have all.my memory chips inserted backwards. I found my prototype projectiles, with Richards 1.36 I have a comfortable 209 gr open tip with some room far a tad more lead. How they function for 300 BO I do not know. Looks my 300 BO AR pistol have some experimenting this spring.
    Last edited by just bill; 02-07-2021 at 02:26 PM.

  4. #4
    Boolit Buddy M.A.D's Avatar
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    I make a very thin pure copper jacket for subsonics 1.4 inches long and 0.015 thickness Only issue is I'm in Australia.. And postage rates are a killer

  5. #5
    Boolit Buddy
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    A buddy and I just found out that 200 grain long round nose would not fit in a p-mag. They kind of fit in a standard mag. Now we are trying a 10s die but leaving an 1/8" meplat. We think this will work but the jacket is 1.1" long and 165 grains. I can try a 1.3" tubing jacket .030 wall tonight and see if it can hold 200 grains.

  6. #6
    Boolit Buddy


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    Quote Originally Posted by Gew View Post
    A buddy and I just found out that 200 grain long round nose would not fit in a p-mag. They kind of fit in a standard mag. Now we are trying a 10s die but leaving an 1/8" meplat. We think this will work but the jacket is 1.1" long and 165 grains. I can try a 1.3" tubing jacket .030 wall tonight and see if it can hold 200 grains.
    That's very true. I have a 1E point form die and it won't chamber the way it is due to the reduced taper. The way I solved it was to get a dual diameter sizing die. The upper part of the bullet gets reduced to .300 which makes that portion bore riding. The back end is a full .308 which engages the rifling. It works very well.

    Having said all that, getting these bullets to open is a challenge. I score the jackets and use a bullet ball to get them to open up. Core bonding also helps and a deep hollow point.
    Zbench

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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