We had some very close to camp but as they usually do, they ran. I rolled mine at 425 yards with a Tikka T3 in 270WSM, using a 130gn Hornady GMX, 61.0gn IMR4350, CCI250 primer, Federal brass.
I love the dynamic nature of pronghorn hunting. Things unfold so quickly and with a smaller critter, really forces your shooting to a higher or lower level, depending on your preparation. Cheers