Neck runout with redding bushing die

[Thor2j]

Hi all,



My Lapua 338 brass comes out of my gun with a neck runout of +/-.001", when I run it through the Redding neck sizing bushing die it comes out at +/-.004". I've tried 2 different bushings, with and without the neck expander ball, with and without mica. Cleaned die completely and nothing changes. I have 3 other redding bushing dies in different calibers and they all make the necks +/-.002". Any suggestions or do u think I have a bad die.



thanks.

P.S. Using an RCBS Rockchucker

 

[243winxb]

338 LAPUA MAG bushing range .361-.369"

If sizing down .008" or more in one step, try using 2 bushings, 2 steps . Start with a .367" then finish with a .363" or what ever size will work for you. The size stamping on the bushing must face towards the case mouth. If up, towards the bushing stop, bushing may become crooked. If this doesnt help, contact Redding.

 

[Walkalong]

That's it in a nutshell.

 

[Thor2j]

Yes the bushing is facing the right way.