The EXACT muzzle velocity will vary with the weight of the bullet, and the barrel length of the rifle. The 140 grain bullet is fairly popular, and leaves most hunting rifles at about 3000 feet per second. Lighter bullets may travel at 3300 fps, heavier at about 2700 FPS. IMHO, an excellent long range cartridge.
Muzzle velocity of a .270 will vary with the rifle and the loading of that cartridge, but may be as low at 2700 fps, or high as 3400 fps.
As many as the cartridge is capable of.
1000+
About 90 yrds.
According to Hodgdon, it varies from about 2850 fps to about 3600 fps.
The Daisy model 120 air rifle shoots at 500.fps.
It's rated at 580 FPS.
You mean Air Rifle. Yes this is fine. Air rifles (Not AirSoft) usually fire between 500 FPS and 1200 FPS
270
360 fps
375 FPS
300 fps or 320