I am a .177 and .22 guy with airguns so for me 18 grain is “heavy”. I am chuckling at the thought of lobbing a 44 grain pellet. That sucker must take a fair bit to cock to get damn near 600 fps out of that big of a pill. I am guessing it’s not an “all day” springer if you will. Wicked cool gun though. Odd/interesting in that it is a springer.