K&M makes great neck turners. I get a new one engraved with the cartridge it's for every time I get a barrel chambered to something new. Make sure you get the K&M expander mandrel to go with it. This'll ensure you get the right fit on the mandrel.
A few tips that I've learned:
- keep the speed down a bit
- use assembly lube to lubricate the mandrel, just a bit on a Q-tip to wet
the mandrel works best for me.
- have a plate full of ice with some plastic to cool the neck turner
while you change out cases.
Sometimes it's better to go back for a second pass instead of trying to do it all at once, but if I don't get impatient and follow the three steps above, I usually wind up with nice even necks.
I've never tried the carbide mandrel 'cause I never liked having the donut cutter on the inside.
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