30BR cut too far into shoulder?

[TommyD11730]

Extreme closeup.... after 6 firings I notice this Black carbon ring on the brass. You can "feel" the ring with your fingernail.

Im wondering if I cut too far into the neck when turning.

With little 30BR experience not every piece looks like this. However enough of them for me to be ready to pitch the lot.

So should I pitch this lot of brass?

 

[Bill Norris]

Looks like you did cut pretty deep into the shoulder. It may come apart with continued firings.

 

[TommyD11730]

Looks like you did cut pretty deep into the shoulder. It may come apart with continued firings.

Thanks Bill... live and learn

 

[AlNyhus]

TommyD, a couple things to keep in mind as you go forward:
-A cutter angle that's more than the shoulder angle will eliminate the 'dig in' line and give you a smooth blend. My preference is a 35 degree cutter.
-It's unusual to see powder residue on the shoulder. Make sure that you're not bumping the shoulders excessively and/or using too light a load. Double check the neck clearance, too...could be a combination of things going on here.

Hope this helps. -Al

 

[bugman]

Extreme closeup.... after 6 firings I notice this Black carbon ring on the brass. You can "feel" the ring with your fingernail.

Im wondering if I cut too far into the neck when turning.

With little 30BR experience not every piece looks like this. However enough of them for me to be ready to pitch the lot.

So should I pitch this lot of brass?

Here is my 2 cents.......

Before you ditch all that brass, use a dremel and section one case lengthwise. You will notice a "ditch" internally and opposite the external area. If that "ditch" is less thick than the surrounding brass thickness of the neck and the shoulder immediately below it, ditch the brass or deal with the imminent neck separations.
If there is no internal "ditch" and brass thickness is the same as the other areas of the NECK, then you probably used too acute of a cutter angle. In this case, the increased shoulder brass thickness (even with the outside "dig) should be sufficient to prevent separations.

Either way, unless you are really jumping bullets, you don't need to turn onto the shoulder that far.

 

[Shooter13]

You will lose those necks ........... eventually. Take it from one with experience (in losing the neck). My first cutting job was to far down on the neck, I'd eject the case and there was no neck at all OR half the neck left. Not fun or a pretty sight! We try, we experiment and hopefully learn! I learn with every new experience, by the time I'm 100 years old I should have it down .............. or be dead, probably dead. Have a blessed day!!