Very slight corrosion or electrolysis in my Redding Type S - Bushing Style Full Length Sizing Die?

[Campbell]

Please can someone guide me?

I have the above sizing die (which I use with a Nitride bushing) and I am a stickler for keeping all my dies clean.

On one occasion last week I left the above-mentioned overnight without cleaning following a resizing session.

When I came the following day to disassemble able and clean, I noticed that there was a tiny pit mark in the top of the die where the bottom of Nitride bushing sits. I am ABSOLUTELY sure that this was not there before as I checked over the die when new as recommended by Redding.

I use Lee Resizing Lubricant. The instructions state that this lubricant is die friendly, but I think that there is a water content. Could this have caused my issue, or, is there a possibility of electrolysis between the steel die and the Nitride bushing

I have since polished out the tiny pit mark, but had I left the die longer without attention, I think more 'damage' would have occurred.

Many tanks in advance

Cam

 

[spclark]

How did you polish out the "... tiny pit mark" you observed?

To my thinking, a small pit (if indeed that's what was there) on the flat surface a neck bushing rests against (when there's no case in the sizing die) presents no issue whatsoever to full functional capability of the die itself for properly resizing brass.

My Lee dies are for pistol cartridges; those don't use bushings (my bottleneck rifle case dies are either Redding or Whidden) so I won't comment on whether Lee's sizing lube could possibly affect the steel their dies are made from when you're using TiN-coated bushings.

I'd have a hard time accepting there's an electrical potential between the steel die body and (steel-core) TiN-coated bushings or we'd have heard about problems with them in this combination before this.

 

[Campbell]

How did you polish out the "... tiny pit mark" you observed?

To my thinking, a small pit (if indeed that's what was there) on the flat surface a neck bushing rests against (when there's no case in the sizing die) presents no issue whatsoever to full functional capability of the die itself for properly resizing brass.

My Lee dies are for pistol cartridges; those don't use bushings (my bottleneck rifle case dies are either Redding or Whidden) so I won't comment on whether Lee's sizing lube could possibly affect the steel their dies are made from when you're using TiN-coated bushings.

I'd have a hard time accepting there's an electrical potential between the steel die body and (steel-core) TiN-coated bushings or we'd have heard about problems with them in this combination before this.

Many thanks for your reply.

I found a piece of round tool steel with a diameter slightly less than the inside od the top of the die, mounted in my pillar-drill and used rubbing compound.

I take your comments re my questions.

From now on the die will be stripped and oiled immediately after a resizing session!.

Cam

 

[hogpatrol]

I have a couple Redding dies with those marks. I believe they were there since new since there was zero possibility of moisture in my reloading room (AC & heated). Maybe left over from heat treatment? I wouldn't worry about it.

 

[JRS]

You didn't remove the "pit mark". You removed surrounding material to blend in to the depth of the "pit".

 

[Campbell]

You didn't remove the "pit mark". You removed surrounding material to blend in to the depth of the "pit".

Yes!

Any depression aka "pit mark" can only be removed by relieving the surrounding material

Cam

 

[Campbell]

I have a couple Redding dies with those marks. I believe they were there since new since there was zero possibility of moisture in my reloading room (AC & heated). Maybe left over from heat treatment? I wouldn't worry about it.

Many thanks for your reply.

I checked my die(s) on delivery and did not see any blemish until I used the F/L die

Cam

 

[Campbell]

Many thanks for your reply.

I checked my die(s) on delivery and did not see any blemish until I used the F/L die.

Maybe I am afflicted by OCD!!!!!!!!!!

Thanks again.

Cam