I've been told a can with motor oil works well,,,
One outdoor range I used in california had a series of 5 gallon drums buried in the ground,,,
There was a good 3' length of 6" pipe welded to the lid of the can,,,
The cans were about half full of motor oil.
I was told they used motor oil because it would "creep" past the crimp into the bullet and foul the powder.
When a can became full they buried it somewhere on the property.
At my rifle and pistol club I was told to "chuck em in the weeds",,,
I wonder about the person who mows those weeds.
I keep a pair of pliers in my range bag anyways,,,
I just pull the bullet and dump the powder,,,
Then I can chuck it in the trash can.
Aarond