I interviewed well, and never added anything to my time: military guys should log "military time".
I know of guys that "added" extra to "convert" their times to civilian. They didn't fare as well in their interviews. One was actually sent packing due to his times,... and he had a lot.
Face it: most every company knows how you log military time. Be predictable. 500 sorties x .3 = 150 hours. Is that going to be "the end all, be all" for your interview?