About 14 years, it was a Savage O/U (.22WM / .410).
I decided I wanted to catch a bullet. I knew that labs caught bullets in water, so I constructed a water barrel of joined 5# coffee cans. It was 3' long, filled with scummy pond water, with a plastic lid duct-taped on each end, resting on a log in the gravel pit. With my dad watching, I stand about 10' back, line up on the length of the water barrel, and send .22 40gr bullet straight into the barrel.
The first thing I hear post-BANG is my dad laughing his head off. I am soaked in several gallons of pond water, the barrel's nearly empty, having evacuated so fast the top can collapsed inward as the water headed towards me, and what water's left is leaking out the bullet hole in the bottom of the barrel.
We never found my bullet.