chris the 20 tac is one sweet cartridge, low recoil yet hits like a lightning bolt. i really like it on coyotes because it thumps them to the ground and keeps them there. it's a bit much on foxes and tends to leave you with pieces. it explodes jacks just like any high speed centerfire will do.
it seems as though ruger is bringing out a simular version in the spring. you hold your breath so we can call you blue boy. they are usually a little slow bringing things out.
this is the only exit i've had on a coyote so far.
here is a picture of the rifle, the gun shoots in the 2's and 3's