HA Definitely affects xbows on horse back. From what I remember reading, you take a WPF hit when on horseback, and HA lowers that hit. At the very least, my reticule is significantly smaller. Also, I thought Walt or someone else proved that for the Light xbow, 125 doesn't make it any smaller for xbow, and having a MW light xbow SHOULD mean I shouldn't need even that. Also, my 2h WPF is already and 125. Also, ALSO, I usually try to be in their god damn FACE before I shoot, and even though they're taking up the entire reticule, the Bolts still miss. I almost feel it's better TO stop and/or get off my horse, and just shoot that way. Does anyone know whether or not the area of the reticule the bolt goes depends on how fa you're turned on your horse? It seems when I'm turned left, the lower left area of the reticule is where it goes, and the same for the right/lower right.