60 rounds to check L-R, U-D, zero with four different loads.
100 rounds at 20-15-10-5 yards, draw and shoot, as speed.
Worked perfectly with light and heavy 9mm loads. Ejection was into piles, 3:00-5:00, from close to 5-6' depending on the power of the loads.
Zero'd it well enough that 100 rounds of three loads stayed in an IPSC A from 20 yards and in except for three rounds from 15 when I started to go faster than my finger worked.
Got bored, picked up my brass, and went home.
WW115FMJ USA ammo is the same zero as Hornady 115 Critical Defense is the same zero as 4.1 grains Bullseye with 115 & 124 grain FMJ bullets at 25 yards. Makes it easy.