My setup is fx impact 2, power wheel at #5, 150 psi on reg, valve adjuster 4th line. Sighted in at 45 yds can cover a quarter with 5 shots. My question is, is that to fast for the 34.9 gr? I haven't shot at 100yd to see how the groups are yet. Should i stay with 1020 fps or drop it down to...