Re: fps needed to kill a Mountain Lion at close range??
If you have a 22 caliber such as a 22-250, .223, 22 hornet, something that's a tack driver and you have confidence in, I'd suggest an eye shot. I've dropped a lot of Bobcats with a 22 mag through the eye.
"The only difference between mediocrity & excellence is EFFORT!" Mike Walton