Silvereagle50
WKR
Also I don’t see what the ES and SD are of the factory ammo, that is a key bit of info.
Can't speak for this guy and what his ES & SD is, but I've tried the Hornady PH ammo in several of my guns so far (300wm, 280ai, 300Saum, maybe a few others). They all have velocities that stretch out to 30fps in difference minimum. So far the Kimber Montana in 280ai is the only one I've found that likes it best (1/2"moa). The 300 Saum is coming around to it though.