Sorry for your loss.

I imagine your deceased friend was using data from a much older manual. My 1970 Lyman 45th lists 45 gr of 4831 as max for a 100 gr jacketed; that would be the original 4831, not today's H4831. The safe thing to do would be to start over.

Nosler's manual says to use the same data for both bullets.

Someone more knowledgeable can give more details on the coating, supposedly it is an oxide of some sort.

http://www.winchester.com/learning-center/faqs/Ammunition/Pages/ammunition-question095.aspx

http://www.winchester.com/learning-center/faqs/Ammunition/Pages/ammunition-question090.aspx




'Four legs good, two legs baaaad."
----------------------------------------------
"Jimmy, some of it's magic,
Some of it's tragic,
But I had a good life all the way."
(Jimmy Buffett)

SotG