Marks inside case by flash hole?

[savageshooter86]

So I was cleaning my brass and noticed marks by flash hole inside of case. Never seen them before. I use stainless pins so cases are really clean. Looks about the size of firing pin or decapping pin.

Any thoughts?

 

[Homerange]

I used to get a bit of decapping pin misalignment that quite probably left marks close to the flash hole but since I've flash hole chamfered no more decap pin hang ups.
What dies ?

 

[savageshooter86]

Rcbs heavy duty decapping die

 

[/VH]

I don't know how that die is made but is there a chance you may have it set too low and the collet nut (or whatever holds the pin itself) is contacting the web?

 

[savageshooter86]

I don't know how that die is made but is there a chance you may have it set too low and the collet nut (or whatever holds the pin itself) is contacting the web?

No. I adjusted it to bottom out then bacaked it out a full turn and a half. Should be well off the bottom of case

 

[/VH]

No. I adjusted it to bottom out then bacaked it out a full turn and a half. Should be well off the bottom of case

Well sir, if your cases are all the same headstamp/lot, I'm all outa guesses, unless some tumbling media or other foreign object(s) got mashed in there.

 

[Rsadams]

A picture might be helpful...

 

[Homerange]

No. I adjusted it to bottom out then bacaked it out a full turn and a half. Should be well off the bottom of case

Any chance the decap shaft is loose?

 

[savageshooter86]

I'll try to get picture tonight. Everything on die looks good and snug

 

[dmoran]

A general decapping die is not supporting or guiding the case, from which there can easily be levels of mis-alignment to the cases going up into the die. Where as sizing dies with decapping rods, are a match or in close proximity of the case dimensions, there for guide the cases into alignment.

Sort to speak, "its the nature of the beast" with general decapping dies is my input.
Donovan

 

[Comrade Terry]

If you're using a Forster press, make sure the head of the lock ring screw isn't in the lock ring channel. This will cause misalignment, and you risk breaking off the decapping pin. Don't ask me how I know this.

 

[savageshooter86]

A general decapping die is not supporting or guiding the case, from which there can easily be levels of mis-alignment to the cases going up into the die. Where as sizing dies with decapping rods, are a match or in close proximity of the case dimensions, there for guide the cases into alignment.

Sort to speak, "its the nature of the beast" with general decapping dies is my input.
Donovan

Donovan I was always under the impression it was better to decap separate from the sizing operation? Interested to hear more on this

 

[dmoran]

Donovan I was always under the impression it was better to decap separate from the sizing operation? Interested to hear more on this

I deprime with my F/L-sizing dies. Some of which I don't use the expander ball, either by not having one on at all or by using a smaller under caliber ball, so there is no contact with the case neck (for better concentric's).

If I am using a body die (which doesn't have a decapping rod) to resize with, I like to use a neck die, for that caliber, to deprime with since they will guide the case into alignment.
Donovan