Set to far into the case over a regular load and crimped in place I would worry about pressure spike. Pushed into the case so that the bullet is in there loose but the powder is still in place I would not lose any sleep over shooting it. Just don't expect any accuracy from it. Personally I would pull the bullet and reload it but if you don't have a reloading set up give it to somebody that does. Not because I am worried about blowing up the gun but because I like for all of my bullets to go where they are supposed to go.
Good intentions will always be pleaded for any assumption of power. The Constitution was made to guard the people against the dangers of good intentions. There are men in all ages who mean to govern will, but they mean to govern. They promise to be good masters, but they mean to be masters.