View Full Version : Recomendation on how to check loaded amo run out on a lathe with test indicator ?

02-09-2012, 09:07 AM
Re-phrase: dummy round test.
Grab the base in a collet ?
I assume Adjust base as needed to get 0 run out, check further down body /neck/ bullet
what is good .001 ?

02-09-2012, 10:14 AM
A lathe would not really be the ideal tool.There have been many hand held, jig fictures made for this purpose. A lathe would be very slow, and you are dealing with an all brass, copper assembly. That is quite plastic as materials go.

02-09-2012, 12:31 PM
I just ordered a concentricity gauge from 21st Century. Very clever design, it also uses a test indicator instead of the typical dial indicator. You can buy it without a test indicator if you already have some.

http://cache.nebula.phx3.secureserver.net/obj/QkZGODg3Q0I2RTM0RTA2MkJBMjI6ZmIxZDAxODUxZDM5YmIzNz EyNTZkYTE3MDY0YjU1Zjk=

02-09-2012, 11:25 PM
I'm impressed yet again with those guys over at 21st Century. They UNDERSTAND design.....