I'd like to add this for consideration: In one State where I reside P/T, airguns are legal for big game. A 147gr lead airgun "pellet" going 880 FPS at the muzzle is legal and I have a few instances of personal observation of these being used. That kind of power makes me a little uncomfortable personally, but I saw some videos and personally sat with a person where in each instance a WTD of around 120 pounds was shot at a distance of 50-yards and was recovered within close proximity. Texas in particular did a 2-year long controlled hunt experiment before creating their airgun hunting parameters. Your Navy will be at or exceed the parameters determined to be okay by State biologists and game managers. For accuracy, etc, I might cut myself off at 20-yards - but I've seem some 150 grain-ish projectiles at a MV less than 950 fps take a deer at 100-yards, some with pass-through. If its legal, it's your hunt, you know your limitations and what your gun is doing and you know what outcomes to avoid because they will weigh on you. So within reason that is determined by you - I wish you great success and look forward to your report!