My normal load in the .36 us 17.5 777 fffg. That is supposed to emmulate 20 grains of real bp. The recoil is negligible, and it hits POA (It's a Uberti btw)
I tried 20 grs of 777 (emmulating 23 grs of real powder) and it was starting to hit a few inches higher at a range of about 12 yards. I could really feel an increase in recoil from just that tiny load increment.
I think if I went any higher load the thing would be shooting way higher, but maybe POA at 75 yards... (haven't tried, I'm not that good of a shot anyways)