K&M tool help

[Duck_Hunter]

Heres my dilemma. I'm trying to turn some necks using my K&M turning tools but every time I try to use the power adapter the brass wobbles in the holder and no matter what I do I can't seem to fix it.
Heres what I've done using my concentricity gauge:
-Ruled out sizing die (Brass is out less than a thou) and also tryed some Lapua brass.
-Power Screwdriver runout is less than a thou
I've basically got it down to the K&M power adapter has to much runout. Is there a better way of chucking the brass into a screwdriver or am I destined to turn my necks by hand (which doesn't seem like it would produce the best results)?
thanks for any help!

 

[bedrock]

Lee makes a three jaw chuck. The number in Wholesales catalogue is 54908 and Lees # is 90608. Wholesale price is $16.99. You also have to order the spinner stud. Wholesale # 54909 - Lee # 90607. Price is $3.29
Put it in your power drill and away you go. I've used this to turn and clean my brass with for a few years.

 

[J Stuart]

http://www.sinclairintl.com/cgi-bin/category.cgi?category=RECPNT&item=05-260&type=store

Works well.

 

[acrashb]

Wobbling, up to a point, won't hurt anything. You hold the turner in one hand and the drill in the other, and let the turner just move with the wobble.