I have seen that site and there are 3 or 4 more that usually have pictures. By comparing the bullet in question with pictures of same one can often figure it out or get really close. It was the very small hole in the base that put me onto the volcanic bullet, that and being only .31" in diameter. Had I not seen the base I would have just automaticaly thought Colt Revolver. When identifying bullets, measurements, and good pictures are everything. You did great on both! Monty