Pietta recommends 22 grains max BP in my '61 Police .36 Revolver. So when using Triple 7, the recommend reducing the load (by volume) by 15%.
15% of 22.0 is 3.3% and by my calculations, the result would be 18.7 grains.
Would 15 grains be a good starting point, since my adjustable measure is in 5 grain increments????
Thanks for your shared expertise...