I just got a Lyman 225107 mould on ebay thats in the mail to me I paid 127.50 for a single cavity mould that cost 7.47 in 1968 complete with the handles. I will cast some and see what this bullet will do I think this was a special Jet mould as it was not in the line up in 1954 and was dropped not to long after the 53 was discountinued in 1974. Hope to have some info before to long.