Now for the bad news. I doubt that you will find printed information for a 220 grain bullet out of a .308, they just don't work out of it. The .308 Winchester excels with a 165-180 grain bullets so why would you want to use one that can't be driven fast enough to make them effective at the usual hunting ranges.
If you still want to try some 220 grain bullets check out the Barnes Bullet site. They have loads for a 220 grain solid which you can use if you back the powder charge off by 10% and work it up but the velocities are still under 2400 fps for the loads.
I'm with critter on this. I've used a 308 a lot of years and tried lot's of bullet's. 308 works best for me with 165 gr bullet's. Handles 180's pretty well but above that the accuracy falle way off, I mean way off.
Where the larget 300 mags really shine is their ability to handle the heavy 308 dia bullet's.
Moose calling can get confusing to some, but cow calling is your main tool when moose hunting. If you go out and buy moose calls I would say you're wasting your money unless it is the birch bark cone. I find most store bought moose calls sounding worse than puffing a grunt your hands to make the call. You can roll up a piece of birch bark in a cone shape to use as a call and spend your money on a video that teaches you the basics of a cow call. A milk jug or a coffee can with a hole and a rope...