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Albroswift

Pistol caliber trimming with Dillon RT1200

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Been working on this for a couple weeks so far,  ran 450 rounds 44 MAG today no issues +/- .001 or so. Pretty fair results. (The dominant paradigm over on Brian Enos forum is there is absolutely no reason to trim pistol brass, but they are all taper crimp people!)  

Challenges with the RT1200 setup:

Cutter needs to be 1/2 way down into the the tool head

Trim die not available.

Not enough room for 2 locknuts.

13/16x20 thread on the trimmer, 7/8x16 on a die/ toolhead

 

parts.thumb.jpg.b9c642117de51366f41948f245e4f3bb.jpg

Pile of parts, different thickness of locking rings to set height.

2 part die, cut sizing die to hold shell, turned 13/16x20 on the end of a shortened Dillon powder die. First attempt was to turn the 13/16x20 thread on end of sizing die, but waste diameter on the die was too small/ wall thickness wan't adequate, which is to bad, die steel mills way nicer then the metal Dillon uses on their powder measure. 1/4" FIP  hole for vac attachment

side1.thumb.jpg.b393b545623503cff0b1a61c3b8087b6.jpg

Setting final height of locking ring thickness 

 

shell.thumb.jpg.d8a6f62016330db5490cd5097414c64c.jpg

 

cutter1.jpg.eca5e8f93e3ad37ef0d6b44031752214.jpg

First attempt, turns out the cutter does not make a large enough orbit for 44 mag. Needed new cutter design. Cut one out of a parting tool. Start over setting height. 

 

vac.thumb.jpg.a72d0ba604bbd246c1b70d5f3eeb7c2d.jpg

 

Final iteration.

 

 

 

cutter.jpg

side.jpg

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NICE!!!!

 

Now I just wish there was an easy fix for a Hornady progressive press.....I have a very large pile of .357mag and 9mm brass I would lime to run through.

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the Dillon RT1200 (now1500) trimmer motor is spendy, I set it up originally for 308, 338, and 556. The 44 is just a bonus. I think with a little ingenuity you could fix something up, but the RT works very well with the Dillon trimmer dies. Don't know why it wouldn't work with any press.

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