Please help - bullet runout

[Anders Bruun]

I think that i already have found my problem, but not shure how to solve it.

I use Redding Comp dies - neckseizer with bushings - no expander.

In my 6.5 x 55 it is perfect - no problems

But in my 308 i get a bullet runout about .005" - the fired case is fine, but after neckseizing, it in no good

I think the problem is, that i have to set the neck back .008"

Here goes the question (finally) - if i set the neck back in 2 x .004 - will that give me a perfect result - or is it just half a solusion ?

If it is no - good, how can i get my .001" runout, with that kind of set-back ?

Thank you for helping !

Regards

Anders Bruun

[RockZ]

Your Idea is good. It often helps to decrease runout by sizing in steps when you have a large amount of diameter to resize.

[Winchester 69]

By how much are you reducing the case neck's diameter.

[Anders Bruun]

I reduce the neck by .008 - .009, it seems like a lot, but relly it is normal for a standard SAAMI chamber.

Thanks

Anders Bruun

[Winchester 69]

Try reducing the neck diameter in two steps. Taking more than 0.005" at once is known to cause run-out.

[boomtube]

Try a Lee Collet Neck Sizer.

[MontanaRifleman]

Try a Redding Competiton Type S FL bushing die?