Lee Loadmaster: die settings: shell plate loading


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Jumping Frog
March 10, 2008, 09:07 PM
Here is my dilemna. when I am setting up the Lee Loadmaster dies (.45 ACP), I am running it one cartridge at a time through the five stations:

1. Universal Decapper Die
2. Size and Prime.
3. Expand and Powder
4. Bullet seating
5. Carbide Factory Crimp Die.

All five stations were setup so that running one cartridge at a time was producing cartridges that were correctly primed, correct powder, bullets seated to correct length, and crimped. (i.e., 1 cartridge = 5 lever pulls)

When I switched to running the press with all 5 stations filled, so that I get 1 cartridge with every lever pull, it seems like having all 5 stations filled is making my OAL too long. I am assuming that somehow having the shell plate stressed for all 5 stations changes the length setting.

When running 1 cartridge at a time, my OAL was coming out at 1.260". When I switched to all 5 stations filled, the OAL was coming out at 1.280" (+0.020").

I resized the too long cartridges by pressing the bullet in further, although that created some lead squeezings trying to shorten already crimped rounds by 0.020".

Should I be setting the OAL with the press full? Does that mean that the first and last rounds is a session will always be out of spec?

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RustyFN
March 10, 2008, 09:26 PM
Darwin has a new forum for Lee products. You will find a lot of great help and LM guru's here www.loadmastervideos.com. Click on the LMvideo forum for help and videos.
Rusty

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