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Making .300 BLK Brass

Discussion in 'Handloading and Reloading' started by Walkalong, Mar 29, 2013.

  1. Walkalong

    Walkalong Moderator

    Since .223 is hard to find and pricey right now, and fully prepped .300 BLK brass from .223 is even scarcer right now, I figure it was time to make some.

    I have the brass, the little HF chop saw came in Friday, and I figured I would get started tonight.

    I made a quickie stop for the brass. It is 1.360+ as cut, then 1.370+ when sized.

    Attached Files:

  2. Walkalong

    Walkalong Moderator

    That leaves just a little for the WFT to clean up. Not many yet, but it's a start.

    Attached Files:

  3. Walkalong

    Walkalong Moderator

    And very important. Always keep your fingers away from the little spinning wheel. :eek:

    Red agrees. Yep, he was trying out the cut off pieces to see if he could eat them. You know, like the rug he's standing on. Yep, he's why it has missing parts.

    Attached Files:

  4. Walkalong

    Walkalong Moderator

    Shed's a wreck too.

    Attached Files:

  5. bds

    bds Well-Known Member

    = Sigh =

    Wish I had a .300 BLK upper for my AR ... :D
  6. cfullgraf

    cfullgraf Well-Known Member

    Yep, that is putting yourself into your work.:)

    When I formed my large batch of 300 BLK from 223 Remington last summer, I used a Wilson trimmer to do the trimming. Worked, but slow. I now have a 300 BLK WFT trimmer and it works quite well.

    For large volume, mounting the WFT in the lathe is a good way to go but watch your fingers. (Sorry, too many years of working in industry and having safety drilled in).

    If I remember correctly, the cut off blade started to get a bit slow in the 1200-1300 cut range. But, I am afraid I have slept since then.

    And i thought my reloading room was "filled to the gills".
  7. cfullgraf

    cfullgraf Well-Known Member

    Lots of fun to load for. Lots of fun to shoot. I shoot only supersonic 300 BLK, I am sure suppressed stuff is fun as well.
  8. MaterDei

    MaterDei Well-Known Member

    looking good. I've got a RRA lower waiting for some 300 Black uppers to be in stock at Wilson Combat.
  9. Dave Rishar

    Dave Rishar Well-Known Member

    You're pretty high tech compared to me. I deprime the 5.56mm in a universal die, tumble, use the chop saw without a stop (a hair under the shoulder by eyeball is where I cut), size in the 300 BLK die, trim with a Lee case holder in a cordless drill, and then tumble again if necessary, as these are field (not range) pickups that have been out in the weather for up to a few years. I'm still wondering whether or not to anneal the new neck but I'm think that I should, so that's another step.

    It's a bit of work, but these will be subsonic only (meaning pistol pressures) and should last for a long time, so I figure that it's time well spent. And it's not like I can just buy it or something. :(
  10. Lennyjoe

    Lennyjoe Well-Known Member

    I put one together about a month ago. Got a DPMS 16" chrome lined 1-7 twist off of gunbroker for $199. Finding the flat top upper and BCG was a pain but I got it all together now. Shooting 125 gr TNT's over Lilgun til the suppressor comes in. When it dies im going to subs exclusively with this rifle.
  11. Walkalong

    Walkalong Moderator

    Your posts were why I decided to try it. Yes, they work very nicely. Having the bearing cut to stop the shoulder works better than the PH trimmers stationary stop, but you pay for it of course.
    Yea, I have nicked a finger that way before. Gotta be watchful all the time. Great way to get hurt.

    This batch of brass is beat up around the case mouths some, so it is perfect for making .300 BLK. The ammo can is a bit bigger than a .50, whichever one that is.

    Sounds right, IIR your PM correctly. I plan on picking up a spare soon.

    I just needed inspiration to get started. :)
  12. Walkalong

    Walkalong Moderator

    I ran off 625 this morning. They are cut off, chamfered, and deburred. All they need now is sizing, final trimming, a light hand chamfer and deburr, and then remove the crimp on the primer pockets.

    I used less than half of the cases in the ammo can, so I imagine I have close to 1500 in there. Now it's off to work to check an electrical problem they just called about. :)

    Attached Files:

  13. Lennyjoe

    Lennyjoe Well-Known Member

    Are you going to anneal them?
  14. Walkalong

    Walkalong Moderator

    I figure they are freshly annealed, being once fired LC 08, and annealed right where they need it, which is where the new shoulder and neck will be, so no, I am not worried about annealing them.

    I figured one thing out real fast, if you have a case with a dent where the new shoulder and neck will be you are better off saving the case for .223, because when you size/neck it down, it will buckle/double the dent and waste a case which may have been salvageable as a .223.

    It's all sized and ready for the next steps. Time to take my sweetie out to dinner. :)

    Attached Files:

  15. cfullgraf

    cfullgraf Well-Known Member

    I have not annealed any of my 300 BLK resized cases. While I have not put many firing/reloading cycles on any of the reformed 223 Rem cases, I have not experienced any short neck life.

    The resizing is not very much so I doubt the brass gets worked very much. I used to form 7mm Int Rimmed from 30-30 without annealing. No problems either.

    Finally, I form 6.5x54 Kurz Mauser. When I start with a 30 caliber case, neck life is short. But, if I start with 7-08 or 7x57 cases, neck life is "normal" without annealing.
    Last edited: Mar 30, 2013
  16. Jesse Heywood

    Jesse Heywood Well-Known Member

    Hopefully Red won't develop a taste for bloody fingers! :D
  17. Walkalong

    Walkalong Moderator

    Nah, but he'll chew up most anything he can reach. :)
  18. highlander 5

    highlander 5 Well-Known Member

    Made 300 BLK brass with a file and trim die and a sawsall. Ran the case into die cut off excess with saw file and chamfer. From what I can put together no annealing is needed I have Redding 300/221 dies and replaced the expander ball with one made of carbide. Makes loading 300 Blk on my 650 much easier on wrist and elbows.
  19. cfullgraf

    cfullgraf Well-Known Member

    Sounds like Red will take any intruders off at the ankles.:)
  20. Walkalong

    Walkalong Moderator

    Finished them up this evening. I reamed the primer pockets, and while the WFT left the case mouths very clean, there were still a slight burr here and there inside the case mouth on a small percentage of the cases, so I lightly chamfered the inside of the case mouths. Overall I was very impressed with how clean the WFT trimmer left the case mouths. They could have been loaded as is.

    Then into the tumbler for a couple of hours.

    When cutting down .223 cases, I counted out 625 cases, and then did a couple more handfuls, with the idea being to get 600 good cases to load for a .30 cal ammo can to put away for a rainy day. The bullet hasn't been chosen, as testing is not yet finished.


    Woohoo. :)

    Attached Files:

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