Dave,
Not sure you said what you wanted to hit at out to 100 yards or where that 100 yards was but here is my two cents. I have a .177 Daystate Wolverine B in 30lbs and up to 50 yards (no wind) it's a rough one hole with Exacts or Hunters. I have a wooded property and use that out to about 50 yards. Yea, I can hit things farther out, but I don't do it. It's my favorite chipmunk rifle. It's very quiet - one hears the valve open (clink) - then the whack of the pellet hitting the target. I can shoot it with neighbors in their yard and they don't know. I have it up for sale as I stepped up to the below gun.
I also have an .22 Daystate AirWolf MCT in 40 lbs which I prefer if I'm in the field vs shooting from in the house into the back yard (also a one hole gun). I'll use that out to the end of my property which is 85 yards and it's accurate to 100 yards with Exacts, Hunters, and strangely Terminators. Clean kills on birds, rabbits, squirrels, etc with head shots and heart/lung shots. And after seeing what happens to trees/fence posts and 5 inch diameter candles at that distance I'm sure a coon or possum headshot would work too. It's even quieter than the Wolverine as the trigger is fully electronic. One pulls the trigger, hears a 'pffft' and the loudest noise is pellet hitting prey/target
I don't 'need' more but did want to play with .25 and .30 so have an FX Impact on order with the 25 and 30 barrels. It will wear the 30 barrel most of the time, but I wanted to target shoot with both to see how they did. I don't think either of those will be backyard friendly, but for the price of the base gun plus $350 I have both a 25 and 30 platform (and a gun in each standard caliber).