Some old designs of copper jacketed "nitro for black" bullets:



l. to r.: three Collath/Tesco designs of 1905. RWS made 8mm 150 gr. RWS 9.3mm 193 gr. S&B 9.3mm 193 gr. Two forgotten, slightly later competitors: Nimrod 9.3mm 179gr, Chr.Funk 9.3mm 226gr