My Vortex Crossfire arrived today. It is a far more robustly built optic that the Holosun 403b it is replacing. I will be sighting it using the low mount configuration for 25yds. I get lower 1/3 co witnessing with that mount.
I have another thread going here in the EVO forum and there are 2 great videos posted about sighting distance and reloads, great stuff.