What Causes

[Bob Kingsbury]

what apprears to be a slight flairing at the mouth of a case after
neck sizing

 

[Travelor]

It is just spring back from the sizing. The mouth is the most unsupported part and it springs back just a bit.

It whould not hurt a thing.

 

[alinwa]

I get the flaring only on unturned and untrimmed cases. I attribute it to the nasty work-hardened goobers on the end of the factory neck. On my prep'd cases there's absolutely zero flaring.

al

 

[Bob Kingsbury]

AL, I'm not referring to the burrs or the peening affect as you see on just out of the box
cases. Its the faint flare that you can see after neck sizing a often fired case.

 

[John Kielly]

Funny, I've always thought that case mouths tightened inward. Maybe it's a calibre issue.

However, if we cut a bevel on the case mouth to facilitate loading the projectile, maybe that thickness variation causes what we see, or think we see, or imagine.

 

[caroby]

I get the flaring only on unturned and untrimmed cases. I attribute it to the nasty work-hardened goobers on the end of the factory neck. On my prep'd cases there's absolutely zero flaring.

al

Me as well,

cale