What is going on here? Sizing die issue?

[earthquake]

Just started reloading my Dasher brass after about 2 years off. This brass was last fired at the 2020 Grind.

Lubed with 16:1 alcohol/lanolin, put die in co-ax press with no adjustments since last usage. Started noticing some, not all, of the cases look like this. Rounded neck/shoulder junction.

SAC die, Alpha (non-OCD) brass.
Middle one is how they should look. All three went through the die.

 

[Bmghunter]

Maybe not enough lube inside neck?

 

[Hudsflywater]

The only think I can think of is that your bushing got messed up somehow??

 

[earthquake]

I'm wondering if they're being stretched on the downstroke? I don't notice any significant difference on n the feel of the press. I asked some others and it was thought that maybe too much lube. They were rather wet when I sized them.

 

[Cr1775]

What kind of sizing die

 

[Baron23]

What kind of sizing die

SAC die, Alpha (non-OCD) brass.

@earthquake - curious, do you anneal your cases?

 

[earthquake]

@earthquake - curious, do you anneal your cases?

Yes, after every firing with an AMP MK2.

 

[whatsupdoc]

To me the shoulder radius looks too sharp also.

 

[Hudsflywater]

is the neck diameter less on the rounded shoulder vs the appropriate shoulder? I would think that if excessive lube was the cause, it would have also "squeezed" the neck down also?

 

[Cr1775]

When you find out let us know. Im thinking maybe lube mix not consistent? Never used SAC die. Maybe use Imperial sizing wax.

 

[Mk16.5]

I think stretching on the down is right. Bushing not releasing? Expander catching on not lubed inside?

 

[SAUMuvabitch]

Make sure neck bushing is right side up? If I recall correctly, the SAC neck bushings have an Internal shape that is not typical of neck bushings, which could cause the issue you are seeing