Each batch of 5 cases were treated, then placed mouth up inside a plastic ammo box. The box is now closed, which should help reduce any evaporation.

This batch happens to be Winchester Large Rifle primers. Yep, it'd be worthwhile to try a bunch of different ones to see if I get different results. I'd expect the same brand to respond about the same, ie WSR I'd expect to do about the same as WLR. But Federal & Remington primers may respond very differently. I'll probably try to continue this as time permits, do one type at a time & compare the results.

Day 1, after 24 hours:

Untreated - normal discharge. Could see smoke exit the rifle muzzle.

Liquid wrench - Weak. primer ignited, but could not see smoke exit muzzle. Smoke visible inside case.

WD-40 - Weak. primer ignited, but could not see smoke exit muzzle. Smoke visible inside case.

Rem Oil (spray) - Weak. primer ignited, but could not see smoke exit muzzle. Smoke visible inside case.

Dillon Case Lube - Very Weak. primer ignited, but could not see smoke exit muzzle. Slight trace of smoke visible inside case.

Water - Very Weak. primer ignited, but could not see smoke exit muzzle. Slight trace of smoke visible inside case.

Alcohol - Very Weak. primer ignited, but could not see smoke exit muzzle. Slight trace of smoke visible inside case.

Kroil - Weak. primer ignited, but could not see smoke exit muzzle. Smoke visible inside case.

In short, all primers ignited to some degree

Day 2, after 48 hours:

Untreated - normal discharge. Could see smoke exit the rifle muzzle.

All primers still ignited to some degree

Day 3, after 72 hours:

Untreated - normal discharge. Could see smoke exit the rifle muzzle.

Liquid wrench - Weak. primer ignited, but could not see smoke exit muzzle. Smoke visible inside case.

All primers still ignited to some degree, though this time the one treated with water just barely did.

Day 4, after 96 hours:

Untreated - normal discharge. Could see smoke exit the rifle muzzle.

Liquid wrench - Weak. primer ignited, but could not see smoke exit muzzle. Smoke visible inside case.

Water is so far proving to be the most effective agent in killing primers, but it still took 3 days, 4 to completely deactivate.

Day 5 (last day), after 120 hours:

Untreated - normal discharge. Could see smoke exit the rifle muzzle.

Liquid wrench - Strong. primer ignited, but could not see smoke exit muzzle. Smoke visible inside case.

WD-40 - Strong. primer ignited, but could not see smoke exit muzzle. Smoke visible inside case.

Rem Oil (spray) - Weak. primer ignited, but could not see smoke exit muzzle. Smoke visible inside case.

Dillon Case Lube - Weak. primer ignited, but could not see smoke exit muzzle. Smoke visible inside case.

Water - Dead. I could not hear it. No trace of smoke visible inside case.

Alcohol - Very weak. primer ignited, but could not see smoke exit muzzle. Smoke visible inside case.

Kroil - Weak. primer ignited, but could not see smoke exit muzzle. Smoke visible inside case.

All primers still ignited to some degree, except the one treated with water.

Water wins, for WLR primers, but it still took 3 days, 4 to completely deactivate.

I'll pick a different brand primer for the next test.

Test continues, with Federal 210 Gold Match primers this time.

The interesting thing this time is that ALL solvents fully deactivated the primers in a 24 hr period. Not one primer showed the slightest evidence of ignition.

This would appear to confirm my thoughts that primers from different manufacturers would likely respond differently. I'll learn more as this continues.

I ran Day 2, same deal, all dead.

So just for grins I primed 2 more cases. One fired normally, just as a check. The 2nd, I grabbed WD-40, gave it a shot. Waited 10 seconds, and it was dead.

So, Federal primers are easily killed. I also ran through the rest of the box today, all dead, so the Federal run is finished.

I've never had a dead primer in any of my loaded ammo, but I think it's usefull to know just how tolerant the primers we use are.