Recommended: Wilson chamber dies / K&M arbor press

garandman

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Nov 17, 2009
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For concentricity, I've found these Wilson seaters excellent. Always within 1/1000th. With K& M arbor press
7085359

7085358
 
Just switched over to these for my precision calibers (6.5CM, 224V and .223) and a basic Sinclair press. I've been very pleased with the results, and with an FX-120 auto-thrower/trickler, it makes reloading precision ammunition a very speedy process.

I already had turning tools (including expander die and mandrels), so it was an easy transition. Well, except that the .223" mandrel was out of stock at the time; but nothing a few minutes on the lathe couldn't take care of (and a little bit of polishing/grinding to bring to final dimensions).
 
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I wondered about that / neck tension, and how to account for it. I do get some notably different resistance in seating the boolit.

The arbor press is much smaller and lighter unit, you will feel the slight different of resistance. If the press equipped with the force gauge, it measures how much force need you to seat the bullet. At the end, it is a great tool for me. My process are resize the brass with body die with traditional press then neck size and bullet seating with arbor press. It gives me great result of single digit ES. Can you achieve the same with traditional press? I believe it can, but much harder for me.
 
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The arbor press is much smaller and lighter unit, you will feel the slight different of resistance. If the press equipped with the force gauge, it measures how much force need you to seat the bullet. At the end, it is a great tool for me. My process are resize the brass with body die with traditional press then neck size and bullet seating with arbor press. It gives me great result of single digit ES. Can you achieve the same with traditional press? I believe it can, but much harder for me.


What neck sizing die you using with the arbor press?

I suspect neck ension is the next "evolution" in my reloading development.
 
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Lee Collet Die works really good, my runout always stay under .002"

The only issue i have with Lee Collet die is neck tension always around or under .001"