Help with wildcat

[Brute]

Got a friend who needed help working up loads in a 270-308 Ackley improved.Being the rifle junkie I am, I agreed to help.Now I'm looking for help.Anyone have suggestions on starting loads or fireform loads using 130 NBT.Thanks Brute

 

[.30-378]

At .007 off of a 7mm-08, why not start there with a 5% reduction using one of the Hodgdon powders? One old
stand-by is H-380.