Good information from BMI. And as he says, the goats lack of shock from the bullet is so pronounced it makes you feel weird!
I have never wounded, or had a goat get to an area where he was unretrievable. I have shot four goats with a 30-06, one with a 270 and sat by a young son as he killed a nice billie with one shot from his 243. All my goats have been billie goats and a goat hunter, in the name of goat conservation, should learn how to distinguish between male and female and shoot only the males.
For a first time goat hunter, the excitement of seeing goats within shootable distance is over whelming. But slow down and think things over. Most important is can you get to where the goats are, if one drops in his tracks? Goats enjoy going into places where no hunter can follow them.
For a rifle, weight is all important, but stainless steel is just hype and not needed. Also, I wouldn't want the rifle barrel to be shorter than 20 inches and I prefer 22 inches.