Shoulder deformation

A

ammo.crafter

New member
I noticed that several of the shells have small indents on the shoulders of newly resized
30-30 Winch to 7x30 Waters.
Brass was trimmed prior to sizing and the finished cartridge fits perfectly in the chamber.

Rifle is Thompson Center Contender.

Any ideas?
 
The only time I have had those "indents" was when too much case lube was placed on the neck/shoulder areas.

YOu can't compress a liquid very easily, so the softer brass just gets deformed by the excess lube since it has no where to go.

Try regulating the amount of case lube that gets applied to the neck/shoulder areas.

You can fire the deformed cases and the firing will iron out the dents.
 
+1 on Dufus reply

The dimple will disappear when you shoot it - most of the time or it will crease (throw it away).
 
I have done that. Fresh lubed pad and got it on the shoulder. A trace of lube is enough. I use a pad and scrape off the excess with a knife after relubing the pad. Don't press on the cases when you roll them.
 
dimples

Thanks all. I'm certain that is the issue as I use a spray case lube and must have gotten some on a few shoulders.

After 50 years of reloading it's always good to take a refresher course.
 
Thanks all. I'm certain that is the issue as I use a spray case lube and must have gotten some on a few shoulders.


When loading .223/5.56, 6.8 or .308 on my Dillon 650, I lightly spray the cases with Dillon's lube and gets all over the shoulders of the cases. With that lube, I let it sit for 15 mins then mix the cases before dumping in the case feeder. You can't help but get lube on the shoulders. No other way to do it with a spray bottle. I've also lightly coated the necks an shoulders on cases I reload on my single stage press as well with several different rub on lubes and never had a problem. A light coating of lube may be the key.

I have wrinkled the shoulders of brass when reforming Starline's 6.5 CM brass to 270AR. That's a multi step operations. Annealing the brass to soften it really reduces the potential for wrinkles. 270AR brass is easier to form with Lapua 6.5x47 brass since it's already annealed.
 
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