I found a fifty round box of Thunderbolt in my shed a few years back. It had to have been from the seventies and kept in the original box in a dank, damp place.
I shot all fifty rounds without a problem.
It's a good thing it was Thunderbolt, not Lightning. That stuff was crap. It's listed for sale online several places, but when I look, it's Champion, not Lightning. Most of them say Lightning Champion or Champion Lightning, but show a box that just says Champion.
I just read some reviews on the Champion ammo and most weren't very good. One person was having jam after jam in a Ruger 10/22 that worked great with any other ammo they tried, and people are having several other problems with it, like several duds that won't even fire with a second strike, several low power rounds per box, failures to eject, and more. I guess it really is Lightning rebranded.