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Thread: Need outside dimensions of P-W powder bushings

  1. #1
    Boolit Man
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    Need outside dimensions of P-W powder bushings

    Planning to modify a MEC charge bar to take larger PW bushings.

  2. #2
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    W.R.Buchanan's Avatar
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    I would say off hand that they are .875-.002+.000, but it would be a better idea to actually have one in hand before altering anything. The overall Length is also important and needs to be as close to the thickness of the charge bar as possible. It can't be any more than about .001-2 over or under the thickness of the charge bar or the rubber seal wont seal it properly and powder will leak.

    When I made the charge Bar for my Pacific DL266 out of UHMW I was very careful while boring the holes and cutting the thickness of the bar down. Best to creep up on these dimensions so you don't go too far.

    I assume you are doing this on a milling machine???,,,, if not,,,, you need to find someone else to do it for you on a milling machine.!!! You can't get it right by any other means.

    Randy
    Attached Thumbnails Attached Thumbnails Misc Pics 014.jpg   Misc Pics 016.jpg  
    Last edited by W.R.Buchanan; 06-09-2023 at 07:18 PM.
    "It's not how well you do what you know how to do,,,It's how well you do what you DON'T know how to do!"
    www.buchananprecisionmachine.com

  3. #3
    Boolit Master
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    Mine measure .871-.874.

  4. #4
    Boolit Buddy

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    Funny how that works, I bought BPI's adapter to use MEC bushings in my PW PW powder bushings measure ,871-,872 dia and ,998 tall GW

  5. #5
    Boolit Master
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    I had to dig through my Pacific/Hornady powder dies to find a few PW powder dies to measure. I've gone over to the adapter that uses MEC bushings in my 375. The MEC bushings are cheaper and plentiful.

  6. #6
    Boolit Man
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    Thanks, the MEC bar measures 1.00 by 1.00. So it is possible, but I won't try to tackle it. I have a lathe and a big drill press, but no milling machine, and I understand aluminum has the tendency to grab when drilling an existing hole larger.The reason I want to try this is because I'm experimenting with CBI surplus powder. A MEC #46 only throws 32 grains- not enough for a 10 gauge magnum load.

  7. #7
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    W.R.Buchanan's Avatar
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    The reason why you need a Mill is because you don't "Drill" the holes larger, You Bore them with a Criterion Boring Head. Called "Single Point Boring."

    Since you have a Lathe you can also bore the hole with a Boring Bar, Probably easier than doing it with a mill and Criterion Boring Head.

    The numbers on the Hornady Bushings = the Diameter of the hole in them. So you can go to a bushing chart and make any size you want. IE: #386 = .386

    You can also buy Precision Ground 6061 Aluminum Rod that is +/-.001 in diameter. 7/8 rod = PN 9062K34 $19.33/1 ft. or $31.82/2 ft.
    Link: https://www.mcmaster.com/products/pr...~rod-and-disc/

    Here's a link to Boring Bars that you will need to bore the holes in your Bushing Blanks https://www.mcmaster.com/products/boring-bars/

    Randy
    Last edited by W.R.Buchanan; 06-19-2023 at 04:54 PM.
    "It's not how well you do what you know how to do,,,It's how well you do what you DON'T know how to do!"
    www.buchananprecisionmachine.com

  8. #8
    Boolit Master
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    You might try a bigger bushing and put some tape on the inside to reduce the volume. Cardboard works too.

  9. #9
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    W.R.Buchanan's Avatar
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    Go back and read post #7 again I added some links that will be helpful.

    Randy
    "It's not how well you do what you know how to do,,,It's how well you do what you DON'T know how to do!"
    www.buchananprecisionmachine.com

  10. #10
    Boolit Buddy
    Join Date
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    I'd have to check, but a Texan Charge Bar fits a MEC I think, and the bushings are bigger.-I think I get it's obsolete but they show up cheap sometimes and may be cheaper than making a new bar.

    If I have some time, I'll try and look at them. I have a 16 ga Texan and 28 ga MEC. The the lower line manual models.

    I have some Texan bushings extra around somewhere if you decide to consider this route, just PM me and we'll talk.
    Jason

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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