Very excellent. Nice work. Haven't been able to kill anything, because it takes way too many rounds.
Maybe someday, in some later version [ >>hint<<
] it would be cool if the target would blowup with a solid hit (then reappear about 10 seconds later), and maybe smoke with a glancing or low impact hit. Don't know if you actually have access to the actual hit tables, but that would be additional frosting on the cake.
Either way, this is very well done.