I currently shoot a .177 HW100KS with a Bushnell Elite 2.5-16x42 fairly well I think, I use a laser rangefinder and understand my guns trajectory and mildot points of aim. This was my first .177 in over 20 years of shooting .22 to a guesstimate degree of accuracy/aim points and has been an eye opener.

However, I am mainly taking a squirrel or two a week upto 35 yards and longer range crows and pigeons in a neighbouring field and fancy returning to .22 for a challenge.

Can anyone point me in the direction of hard facts about the retained energy of .22 in say 16gns and .177 in 10gns (I prefer JSB Heavies) so I can see if there's any advantage in moving back to .22 to offset the more challenging trajectory?

Thanks to anyone who can contribute!