I left a spare mag, fully loaded, in my jacket pocket and my wife ran it through the wash & dryer w/o knowing it was in there. Once I realized what happened I unloaded the mag & field stripped the mag. It looked OK so I put it together, reloaded the same ammo and took the mag to the range today. All six rounds went off and the mag worked perfectly (old model - no last round hold open). I’m impressed!

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Old Cop
LEO (Ret.)

Generally speaking, going through the wash shouldn't impair the function of a magazine. The ammo continuing to function afterwards is semi-remarkable, as it means that the bullet was crimped into the case enough to make it water tight.

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Shooting Comfort is bilateral.

FWIW the ammo was the old Federal 90 grain HP that still comes in 50 round boxes.

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Old Cop
LEO (Ret.)

Most modern production ammo is pretty water proof whether it has
visible primer sealant or not. Several years ago I tested a variety of
handgun ammo by leaving rounds in a bucket of water for a week and
then trying to fire them. All went bang except for a couple of Blazer
aluminum cased rounds.

I have a brother in law that forgets to empty the pockets of dirty laundry. A Davis Derringer was in his jeans' watch pocket and the Federal 22 Mag ammo survived the washer & dryer at least 4 times and went bang! He paints the case mouth/bullet with red nail polish as an additional water proofing on all his carry ammo and the primer on centerfire ammo too.

Ivan