I took my chronograph out today and see how fast my new GPR was throwing round balls, and at 70grs 3F of Goex, it was only 1460fps (measured at about 30ft). Does that seem a little slow? My rifle loves this load, but I'm not sure I feel its enough for a whitetail at 100yds. The manual lists 90gr 3F as the max- so I had previously only shot up to 80gr. Is the manual low-balling it?
Thoughts?
Thoughts?