I'm not too familiar with the .177's. I have a couple springers, both Hatsan 125 Sniper QE. 22 cal, and 25 cal.
One thing to know about any springer, elevation is their enemy. Thinner air makes less velocity.
Here at 4000' elevation I lose about 50-60 fps compared to down near sea level.
I'm guessing you are probably at or above 6000' ASL. Just something to keep in mind.
With a multi-pump air gun, you could add a pump or two to make up the difference, not so with a springer.
