I understand where you're coming from with the speed to sound theory,...but an average weight pellet suitable to be shot from a springer type rifle will lose stability in flight because the pellet weight is insufficient travelling at +1000 fps velocities ( for 1000 fps rated rifles like Gamo's, Crosmans, etc). POI will fluctuate and consistancy will drop off. Some pellet types more than others. Lighter moreso than heavier pellets. I call it the "Whiffle-Ball Effect". Hence the desired results ( pin-point accuracy) will be compromised and the chances of a clean kill or even a hit will diminish greatly. With these rated springers (1000 fps's), 850 fps seems to be the ideal velocity for hunting 30 yards and in. But this is not often the case with PCP type weapons that can handle shooting heavier pellets at higher velocities. True Magnum Springers can be an exception,...but only with the correct weight pellets and there isn't really to much of a difference. Correct pellet weight to velocity is the general rule,....finding that 'golden' pellet,.....is the big challenge for consistant accuracy and over all optimal performance.
As for lightning speed critters,..not too likely,...either I'm way off on this one,..... or I've been fortunate enough to come across ALOT of deaf, blind, slow, or stupid critters. LOL's Even with an old Marksman 0035 shooting sub 625 fps in .177 cal at 25 to 30 yards. Happy Hunting!! tjk
