Do not load 150 grains of Triple Se7en in loose form. Loose Triple Se7en is 15% stronger then Pyrodex RS. In many rifles the max load of loose Pyrodex RS is 120 grains some manufacturers suggest only 100 grains of FFg in loose form, so be careful. Check your rifle'smanual. The difference between FFg & FFFg varies from powder to powder but to be on the safe side, figure an additional 10-15% and work you load up from there.

The way I work my loose powder is Triple Se7en FFg is 15% stronger then Pyrodex RS or Select or Goex 2f.
Triple Se7en FFgis approximately equal in strength to Pyrodex P and Goex 3f. Triple Se7en FFFg is 10% stronger then Triple Se7en FFg.

I have no idea how Black Mag3, AAP, or Pinnacle fit into this mess.