Though I got carried away and tried various guns after that, about half of them ended up misfiring. Those misfiring guns are the ones I didn’t use a lot in my previous life. Since I’m not familiar with them, I can’t quite picture them and they end up not working. I may have to know every part of the genuine article to picture it right and make the spell work.
I keep shooting as I make hypotheses and I stop when I reach 20 shots because I’m out of mana.