I am really cheap but I would still not take a chance on trying it. If it has rifling groves in it how are you going to get it to seal in the brass properly? And then if it isn't sealing in the case mouth, as it should be, your going to have to worry about various unpredictable reactions, powder escaping from recoil when other rounds are fired, pressures becoming totally unpredictable because of an improperly sealed round, possible jacket separation is also possible upon ignition. A possible unintended ignition from another round being discharged could also occure when that round isn't in battery. Jeeze, the list goes on as to why you shouldn't use rounds that are groved.
A .20 cent bullet isn't worth the life changing risk at hand. You can lead a horse to water, but you can't make them drink!