Based on all the reports coming in, I decided to summarize the general findings of all those who have reported the condition of the AIM Guatemalan 5.56 ammo they have taken delivery of so far. Please feel free to add your findings so people can get an accurate picture of the condition of this ammo and also for the benefit of those who want to leave the ammo sealed in the battlepacks for long term storage. For the sake of clarification, tarnish should not be classified at corrosion. Just my opinion, but I’ve been buying tarnished ammo for decades and have never had a problem with it. A lot of the LC ammo is tarnished that was manufactured in the last three years or so and is perfectly okay. Corrosion will appear to be a white(ish) deposit or rough feeling rusted looking exteriors. It would be helpful if you report the year, lot, and general condition of the ammo. Condition quantification using percentages gives a better picture of overall lot health. Also, I am sure AIM would like to know if there are any “problem” lots that the field is seeing that would validate their own inspection findings. “Hats-off” to AIM for implementing a self-inspection of this ammo. Here goes:
1988 Lot 7 One report that says lot is good.
1988 Lot 8 Two reports that say lot is good (less 2 corroded rounds reported).
1990 Lot 2 Two reports that say lot is corroded or up to 50% corroded.
1990 Lot 8 One report that says lot is corroded.
1990 Lot 9 Two reports that say lot is corroded or up to 75% corroded.
1990 Lot 11 One report that says lot is up to 20% corroded.
1990 Lot 12 One report that says lot is corroded.
1990 ????? Lot not reported. Two reports. One says good and the other says tarnished.
1991 Lot 6 One report that says lot is 4% corroded.
1992 Lot 7 One report that says lot is tarnished. Some rounds show white discoloration.
1992 ???? One report that says lot is good.
1993 Lot 1 One report that says lot is corroded.
1993 Lot 3 One report that says lot is 100% tarnished.
1993 Lot 5 One report that says lot is bad.
1993 ???? One report that says ammo is good. No mention as to lot #.
1997 Lot 6 Five reports that say lot is good, < 1% tarnish, “flippin perfect”
1997 Lot 7 Eleven reports. Lot is from < 1% up to 30% tarnished, < 1% corroded, or good and one report calls it corroded.
1997 ???? One report that says lot is good.
Based on reports so far, sometime in early 1997, ammo started being packed in wax coated cardboard that has been mostly effective in reducing the corrosion people are reporting with earlier lots. Just from the limited input so far, it looks like 1988 ammo is okay, 1990 is showing substantial corrosion, 1991 shows some limited corrosion but most of it is good, 1992 shows some tarnishing but little corrosion with most of the rounds being good, 1993 seems to show a lot of tarnish and/or corrosion on most of the ammo, and 1997 (by far the largest number or reports) seems to be pretty much okay. I didn't want to hijack anyones thread but was feeling skeptical that this stuff is good enough to buy but when I look at all reports, it does not look as bad as I had feared.