Still playing the VB6 game, but I would often build long range probe missiles with ranges in the billions of km with small active sensors. Either the enemy shot them down, or they would get sensor readings on the enemy ships. Either way, it was a very good way of getting information on the enemy weapons, AMM ranges, that sort of thing. And because they had reduced fuel consumption engines, they were very cheap, so I could just make a lot of them, fire the whole magazine at an enemy planet, and bleed the enemy of AMMs.
My scout ships often had reduced fire rate launchers and a magazine, just for launching probe missiles. And the nice thing is that cheap missiles used to soak enemy AMMs don't really go obsolete, so you can just mass produce them from your ordnance factories and stockpile them.