Based on what I can see from the pics, I would say they are poorly cast .338 185 grain bullets. Probably the molds were not smoked and the lead did not fill the mold properly. Seems to be quite a few voids in the bullets. If I had cast them, I would have remelted them down and tried again. Typically when you cast bullets, you cast them oversize e.g .339 and then size and lube them before loading them up.
Did you have a purpose in mind for those bullets when you purchased them?