The best load is: That or 22 grains of accurate 2015 behind anything from 35 grains to 55 grains.
I have loaded a couple boxes with this powder too. I had a can in the back of the magazine and hadn't used it before... WOW, from my first load WOW accurate in my H&R to say the least!! 1/2" groups NORMAL!! Mine is a older BR2015 green can. I looked last nite at Cabelas, they had none. I need to find some more of it!!
As for the Mini, I have owned two, but none recently. A fun gun, absolutely, reliable yep that too, but accurate?? As Samantha Stevens used to say, weellll...
Not so much.
Probably fine for shots within 100 yards.
CW