Probably your best bet is to buy the closet size bushing and then open it up to what you need. Remember that is very dependent on what size case bullet you are going to shoot. You first have to see what your groove diameter is, but actually you should shoot a cast bullet closest to your throat size. Remember what ever size your bullet will end up being you only want a inside neck diameter 1.5 thousandths smaller.
As far of bullets you have to determine what velocity you will be shooting it. The best bullet I found for all around use is the 130 grain Kurtz. It's a Loverin type bullet, but it doesn't have the narrow bearing bands like Lyman Loverins do. It think that's what makes that bullet better.
You're also want to learn how to use 30-06 brass and how to prepare it for use. Best person to talk to about that is Larry Gibson as he knows more about the 6.5 Swede then anyone on the planet including some parts of the Universe.