While Ffg works, as you've seen, Fffg is generally considered to be the better powder for the small bores. Each rifle being an entity unto itself only shooting it on paper will tell the whole truth.
The 3 32's I've had over the years all liked 20 grs. of Fffg. Nice load, doesn't foul much and is generally more accurate than most of us can shoot. You can shoot more powder but if 20 works, why increase the load 50%?
Vic