J & L cast Bullets Help!

[nitro450exp]

Hello All,

I just bought some J & L .475 520 Grain 4 groove, Moly Coated ?, cast bullets.
My google searching turned up that Jim Cox ? was the owner of J & L cast bullets.
He has since retired and PGB Superior ( Pretty Good Bullets) apparently bought out his equipment and IP.
I have been unable to contact PGB, they have 2 old locations CA and TX, but none of the phone numbers work.
I want to load these in a 470 NE but have never loaded lead cast bullets.
They are not GC'ed and there in no lube in the grooves, they appear to me grahite or molly coated as they have a dark grey/black color.

Any history about J & L and loading suggestions would be appreciated.

Thanks

[HORNET]

PGB Superior used to post on here once in a while until shortly after she moved to Texas. I don't know if she's still in the business or not. She had some interesting designs in her listing. Also posted pictures of some very nice looking Garands.