I have been trying to figure out whether I should submit my physics subject test score to grad schools if it is optional. I scored a 29 percentile on the test which despite being relatively high for my school doesn't look great on a grad school app. 'm not applying to any really top schools but I am applying to a few mid grade ones. Am I better off omitting this score from my application or will I be penalized for that? Any input would be greatly appreciated. Thanks!