3.9g of Titegroup is what I use. This is off hand, standing, at 10 yards. 10 rounds, so one group of 4 touching, a second group of 2 touching, and four singles. This is out of my stock CZ 75B.
Looks like I'll give 3.9 gr of TG a try.
Te occidere possunt sed te edere non possunt nefas est