not sure of the specific question, but , mine is 25 cal, i get from 20-40 FPE depending on power setting. i can easily take raccoon size animals out to 20 yds on low power and out to 50-60 yds on high power.
I recently bought a Bantam Sniper HR in .22. It shoots well, plenty accurate for squirrel hunting. I'm getting about 880 fps with JSB 18, which I consider sufficiently powerful. Heck, I've killed a bunch of squirrels with a 12 fpe rifle, so 30 seems plenty for me. I'm used to light pull triggers, so the 1 pound pull of the Bantam is challenging me, but I'm getting better with it. The lighter rifle and heavier trigger require a firmer hold, but as I learn to control it, accuracy is improving. This is a typical 5 shot group, about 30 yards, with the JSB 18, not as good as a couple of my more target oriented rifles, but plenty good for squirrel head shots (the hole marked through is not part of the group).