The Firing Line Forums

Go Back   The Firing Line Forums > The Skunkworks > Handloading, Reloading, and Bullet Casting

Thread Tools Search this Thread
Old February 5, 2013, 10:12 PM   #1
Senior Member
Join Date: January 25, 2009
Location: Liberty Twp, OH
Posts: 281
Question on Case Corrosion in “Short Term” Storage

While sorting some recently tumbled brass tonight, I found something interesting. I was sorting through some partially used boxes of reloads, trying to get spent cases back with their mates and found several rounds that appear to have a rust like corrosion on them. The copper jackets on a few of these show dark black spots near the crimp ring. Worst case on the left - moving to only slight spots to the right. All damage lower than the storage depth of the Styrofoam holder noted below.

These cases were loaded with the following components in December 2008. 38 Spl, 125g Rem SJFP, 4.8g Universal, CCI 500, in PMC cases, third loading.

Six rounds from this box were shot in mid 2009 and the box was returned to storage and stayed there until recently as I moved residences a twice and have been primarily shooting 38 HBWC and focusing on loading 45 acp since that time. Theses rounds were stored in Styrofoam blocks cased in white cardboard boxes inside an ammo can with a silica gel blocks that were oven baked twice during the 4 years. Cans were stored in cool dry room.

After finding this, I pulled remaining 6 boxes of 38 spl loaded at the same time and found no other issues. Most of the other cases actually appeared to be slightly brighter. Upon further inspection I found a small stain on the suspect box. Nothing concerning on the Styrofoam insert.

I can only surmise that one of two things happened: 1) water got on the box at the range back in 2009, or 2) the subject box must have sat on my work bench during the gun cleaning chores that day back in 2009 and received a few drops of #9 cleaner. I seriously doubt water would cause this, but wonder if the cleaner could cause such corrosion.

Anyone have input on possible causes?
Attached Images
File Type: jpg CaseCorrosion.jpg (171.6 KB, 35 views)
File Type: jpg casecorrbox.jpg (81.0 KB, 23 views)
j357 is offline  
Old February 6, 2013, 12:22 AM   #2
Senior Member
Join Date: October 17, 2007
Location: WI
Posts: 611
I have given older ammo a wipedown with a very lightly oiled cloth to prevent that. Looks like it may of gotten slightly damp some way or another.

I'd wipedown the rest & shoot it up, discard the tarnished cases. I would dispose of any that are real bad.
sourdough44 is offline  
Old February 6, 2013, 10:57 PM   #3
Senior Member
Join Date: January 25, 2009
Location: Liberty Twp, OH
Posts: 281
Thanks for the response sourdough44. I do plan on disposing of all the rounds in the picture.

Still wondering what I did to them.
j357 is offline  

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

All times are GMT -5. The time now is 09:05 PM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
This site and contents, including all posts, Copyright © 1998-2017 S.W.A.T. Magazine
Copyright Complaints: Please direct DMCA Takedown Notices to the registered agent:
Contact Us
Page generated in 0.04783 seconds with 8 queries