I got the bright idea of doing this only after FLS some cases. Looked up the web and it said to leave the dead primers in. "No matter", I thought and found a dead one in the bucket that catches them. It had no anvil and because I did not want water in the primer pocket, the primer was seated upside down, in the interest of a really accurate measurement.
Squirted some water in the mouth and looked for the level with the sun shining on the mouth. There it was! Squirted in some more. And some more...........and more.
Hey, wait a minute the water was leaking past the primer
Reckon the joke is on me
So that's why they don't decap
Maybe next time