I just the Lee Neck sizer dies and am going to follow mathman's instructions.
First off all of my cases have been sized with the RCBS dies and yeah the mandrels have ben pulled through from the RCBS concentrity gauge. The case neck appear to have runout of .002 - .003.
I will be trimmimg them and testing the run out of the cases.
My question is if I use the Lee neck sizers and since the neck is pressed against the mandrel the necks will get a little longer. Do I need to trim to the minimum length again?
Second question is if my case has run out of .002 or less I can use the Lee neck sizer to get straighter cases. What about cases that have more run outs? Do I just discard these cases?
The obvious question here I am asking is this is what I have so I am on the journey to see if I can get straighter neck but throwing away cases that are bad...no way to fix this right?
I will be trying first the 308 or 243 and see how it goes but I also got a few others. Its too bad all of my cases were run through the rcbs sizer dies where the mandrel is pulled through the necks!
Thanks.
