Why does the neck of a case crease if there is lube on it?

[jaternoslo]

teach me with all your wisdom, why does this happen?

 

[yodave]

you can only compress it so much before it become solid like enough to make the brass move out of its way.........

 

[ReVoR]

Similar to hydrolock on an engine. The grease has to go somewhere, the brass is the weakest link.

 

[JD Spanner]

Too much lube

 

[jaternoslo]

yes, this makes sense. but the grease i put it on is so minor. crazy it would have such an impact.

 

[kamlooky]

It starts to accumulate.

 

[Tazzy]

Hydraulic pressure

 

[norskie]

Similar to hydrolock on an engine. The grease has to go somewhere, the brass is the weakest link.

Or LuLu lemon on a large lady....

 

[tjsudbury]

Or LuLu lemon on a large lady....

for the win!

 

[nevanevan]

Never apply lube to the shoulder and you'll never have to worry. I lube the bottom 1/3 of a case and it always resizes nicely

 

[Kryogen]

Or LuLu lemon on a large lady....

That's a good one.

Because oil will not compress therefore it will push on the case in the places where it is accumulated.

I used to use a lot of lubes, now I use imperial sizing wax for precision rifle loads, works really well.

I use one shot lube for pistol cases. (spray in a ziploc, tumble with hands, lay on a pan to dry, done...)

For volume reloads, I use the RCBS lube die with rcbs lube. (like 223)

 

[New Camper]

Or LuLu lemon on a large lady....

Worst analogy EVER! {shudders} It'll be awhile getting that mentally unseen, thank you.

OP X2 on what Kryogen said: No fluid can be compressed so all the force you exert on the reloading press is being exerted on excess case lube/lube in the shoulder/neck area, which in turn is exerting the same force unto the die and case wall. Since the die is a quarter inch thick tool steel, you are getting dimples and creases in the case shoulder. I did this once... the first couple cases I ever put through a sizing die and never did it again.

 

[Kryogen]

not that it matters that much, shoot those cases and next time, use less lube.