RE: .22 vs. .17
The 17hmr has a stated muzzle velocity of 2550 fps not 2800 most tests show about 2600 fps sighted in to zero at 100 yds you are 34 inches low at 300 yds and have roughly 40 ftpds of energy any ehthical person would not be trying to kill a coyote at that distance with so little energy.