Some months ago I made a comment that I was going to run my own test on the methodology of neutralizing a live primer. I know that some of you may think I've gone mad, wasting primers in an effort to determine whether the old standby, WD-40, will effectively neutralize them. I used six Winchester primers, small pistol (i'm not that wasteful a person). Two groups of three primers. Each group was kept submersed in either plain Florida tap water or WD-40. The immersion began on Aug 6th and continued until Aug 23rd, when they were removed from the water and WD-40. The two groups were set on paper towels to dry out. I left them on the reloading bench, in the garage in this absurd Florida heat and humidity, until this evening. I had been putting off testing them until I had an already dirty firearm in which to test the results. Every time saw them on the bench, I didn't feel like dirtying a firearm just for the test. So after making a range trip today for chrony testing some new loads, I got around to concluding this little test. After immersion for 17 days and a drying period of 48 days, I loaded the primers into some 9mm brass for testing. The test was using the primer only - no powder charge or bullet. I did not feel like banging squibs out of a barrel this evening. I did NOT use ear muffs, as I wanted to be able to adequately hear the results. First tested were those immersed in the WD-40. Two of the primers barely made enough of a noise to say they were not duds, the third was definitely a dud. Then to those immersed in water. All three primers detonated with the same forceand sound as a regular primer used as a control. Conculsion: the WD-40 does work. Does it require LESS than 2 weeks immersion to insure it will not fire, maybe someone else might want to test that theory. As for the water immersion, it will not neutralize a primer once the primer has dried out. Hope you all can find some usefulness of this little test.