The photo shows one of the 300 gr mystery 375 cal bullets (right) next to a 300 gr Barnes Triple shock (left). At the bottom is the base showing exposed lead and a pretty darn thick jacket. I baught 100 of these at the Wasilla gunshow. The guy selling them didn't know too much about them other than they seem to have a steel jacket plated with copper. A magnet will pick them up and it looks like steel when I have scraped away the copper.
I can't find any information on a steel jacketd bullet in any of my reloading manuals. Is this a discontinued Hornady?
Can anyone identify this for me? I would think I'd have to back off on loads for copper jacketed bullets as a steel jacket would most likely increase pressure. Is that true?
Thanks in andvance.