I use Frontier Bullets and they are primo.
I sent an e-mail to Frontier about what data to use with their bullets and here is their reply.
Good day Peter,
Unfortunately, we do not have access to any powders apart from the South African Somchem powders.
Treat the bullets the same as any FMJ bullet of the same weight and load according to the data of the powder manufacturers.
Please let us know how you are doing and once you have worked out your loads?
Kind regards,
Susan Economakis
Frontier Metal Processing