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Thread: Marshall Reloading Heated base for Star or Magma sizers

  1. #1

    Marshall Reloading Heated base for Star or Magma sizers

    Here are the plans to make your own heated base for a star or magma sizer. The plans are 1:1 on the base so you can use the plans as a template, just measure a couple dimensions to verify first. The nut piece for the ejection tooling can be made from all thread and a custom nut which can be easier to make than the piece on the drawing. If you are just making one the material will probably be simpler and easier for just machining it as one piece. A Uni bit can be used to debur the big tapped holes in the base quickly and easily, I usually debur first and then tap second. These holes also need to be tapped straight for the removal tooling to work.Click image for larger version. 

Name:	Marshall Reloading Heated Base.PDF 
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  2. #2
    Boolit Master

    Join Date
    Jun 2013
    Posts
    367
    Love the plans they look nice. I don't know if I will have the tools (taps) to build one of these any time soon, but it's nice of you to post them.

    If I were to make a change would be that it just needs to be made a little wider to fit the bullet feeder (Just one more hole to drill and tap for that).

  3. #3
    I've been told that a 6" wide base will be enough for the bullet feeder, but I don't know where the hole goes for it.

  4. #4
    Boolit Mold
    Join Date
    Feb 2016
    Posts
    1
    Like the drawing where did you get the heater element?

  5. #5
    Boolit Master VHoward's Avatar
    Join Date
    Apr 2011
    Location
    North Bend, OR
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    1,792
    http://www.mcmaster.com/#cartridge-heaters/=110u2kq
    80 watt would probably be enough. Use a PID to control it.

  6. #6

  7. #7
    Boolit Master VHoward's Avatar
    Join Date
    Apr 2011
    Location
    North Bend, OR
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    1,792
    http://www.mcmaster.com/#cartridge-heaters/=12lepoz
    You have to select the diameter you want and 2 inch long is enough. The plans show a 0.250" hole for the heater, so you would choose 1/4 inch diameter.
    You could use a light dimmer switch to control it, but a PID would be better.

  8. #8
    Boolit Master
    Join Date
    Nov 2012
    Location
    Norway
    Posts
    363
    I have the original Star heated base plate but I can't see a drilled hole for a thermocouple. Where would you put it? And what kind of thermocouple would you use?

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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