Rust inside sizing die

bpk1982 · #1 02-06-2019, 07:53 PM

I bought a used 223 FL sizing die from a forum member and it looked to be in good shape. However when I tried to size a case the brass came out with grooves/scratches. Upon further inspection there is corrosion and light pitting on the inside of the die. Any advise on how to smooth it out inside?

elkhunter11 · #2 02-06-2019, 08:05 PM

You can try Kroil on a bronze brush to remove rust. I have also seen brass deposited in dies cause by people not using enough lube, and I was able to remove it with a brush and JB bore paste..

Pathfinder76 · #3 02-06-2019, 08:35 PM

Chuck a ten gauge bronze brush in a drill and cover it with iosso or jb and run that into the die until clean.

bpk1982 · #4 02-06-2019, 09:33 PM

Thanks for the advice guys. I didnt have the products you mentioned. So I put G96 on a .375 bronze brush and polished with the drill for a few minutes. I guess it knocked the rust down because I sized 10 cases with no scratches or grooves. However I can still see the rust stains when you look into the die with a light. I'll pick up the products you mentioned and see if that can fully get rid of the rust.

petew · #5 02-09-2019, 04:00 AM

add some 0000 steel wool to the brush and polish out the rest of the stains.

RZR · #6 02-09-2019, 07:44 AM

Pull it apart and glass bead the inside.

Pathfinder76 · #7 02-09-2019, 08:01 AM

Quote:

Originally Posted by RZR

Pull it apart and glass bead the inside.

Yea, let’s throw a matte finish on the inside of your die. Don’t do this.

303carbine · #8 02-09-2019, 05:30 PM

Quote:

Originally Posted by petew

add some 0000 steel wool to the brush and polish out the rest of the stains.

I agree, 0000 steel wool should take out the small scratches as well as the rust and pitting.

bpk1982 · #9 02-09-2019, 11:05 PM

I will try the steel wool to finish the job. Thanks again for the tips guys.

frigpig · #10 02-10-2019, 10:34 AM

There is a spray product called rust converter that is a truly great thing. I've actually used this on dies. Let it do its thing then polish out the die.

RZR · #11 02-10-2019, 10:44 AM

Quote:

Originally Posted by chuck

Yea, let’s throw a matte finish on the inside of your die. Don’t do this.

If your using lube it's not going to effect anything. Your not changing or deforming the die in any way.