.300 savage is ballistically similar to the .308. I generally load 125-150 grain bullets for it. The original 99 Savage didn't take chamber pressures like you see on modern firearms so info on it is for lower pressure loads. It wouldn't be my first choice for a moose or long-range shooting, but for a first gun it will probably serve very well.

i wouldn't pick up a 300 savage unless you're into handloading. i don't see much for factory ammo out there, and you'll pay dearly for it($30-40 a box). it's a lot more similar to a .308 than a 30-30(in fact, it blows a 30-30 out of the water ballistically).
that said, i absolutely love mine(i have a 1960 Savage 99F). i load 150gr bullets at 2600fps and 165s at around 2450. combine that with a rifle that weighs about 7lbs fully dressed with a 2-7 scope, and points like a nice shotgun, i could probably be happy not owning another rifle for hunting this state if i didn't have anything else to pack.