Scratches on case neck

[Jacks Grampa]

Neck sizing some .223 and got scratching on the case neck. They're clean and lubed and I've cleaned the die as well as I can. Any input would be appreciated. Thanks, James

 

[Mulligan]

New die or bushing?
CW

 

[Uncle Ed]

It looks like the die is picking up brass and scratching the case neck.

Causes.

Not deburring the outside of the case mouth enough.

The die between the neck-shoulder junction is rough and picking up brass.

Fixes.

Clean the dies neck with a strong copper bore cleaner to remove the brass.

Use a snug fitting shotgun cleaning mop attached to a drill and apply J&B Bore paste, automotive rubbing compound, etc and polish the neck-shoulder junction.

 

[Juppe12]

I have had same scratches on new RCBS dies. Redding/Hornady, no scratches. I did do same treatment as Uncle Ed mentioned on RCBS dies, worked fine.
Not sure if RCBS is little more coarse than Redding or Hornady.

 

[47WillysGuy]

Neck sizing some .223 and got scratching on the case neck. They're clean and lubed and I've cleaned the die as well as I can. Any input would be appreciated. Thanks, James

Put oiled 1000 grit sandpaper on a dremel motor and polish the die neck out.

 

[Jacks Grampa]

Sounds like some polishing is in order. It's a Redding die that I bought used.

 

[243winxb]

May come from trimmed brass that was not chamfer & deburr before neck sizing. Or carbon that was not removed first.

 

[Jacks Grampa]

I assume the scratches are just cosmetic and won't affect performance.

 

[Jacks Grampa]

Polishing worked. Thanks for the help.

 

[divingin]

I assume the scratches are just cosmetic and won't affect performance.

Those scratches in your pic won't affect anything.