im about to get a 665 fps air gun if i shot it with metal pellets can i kill a turkey? squirell? or bird? with it
My answer assumes its legal to use an airgun for hunting in your state/province/shire/etc... Check your local hunting regulations before you go hunting with an airgun.
Turkey - no. Aside from the fact that a .177 caliber pellet gun lacks the energy to kill a turkey humanely (which is a big deal), its almost certainly illegal to try. If you were shooting a 100 grain 9mm pellet, or a 180 grain .50 caliber pellet at those velocities, it might be a different story about the energy levels, but probably not the legality.
Squirrel - Yes, with the caveat that you need to shoot from close range (20 yards or less) and be able to make a headshot every time. Your gun only needs to deliver 3 ft-lbs of impact energy (or 415 fps of impact velocity with an 8 grain pellet). A gun with a muzzle velocity of 665 fps with 8 grain pellets, delivers 7.86 ft-lbs of energy at the muzzle. That's enough to meet the minimum requirements out to 20 yards (roughly). However it would be better if you had a more powerful gun since it would give you a greater margin of error.
Birds - yeah. Again this assumes its legal to hunt birds with an air-rifle in your state/province/shire/etc..., but birds up to the size of pigeons only take 2-3 ft-lbs of impact energy. Your gun has enough power to deliver that out to 20 yards or so.
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