to me a long range varmint gun sounds more like a .25-06 than a .308 but the .308 will do as well.

I'd seriously look to Savage for that rifle.....the Remington 40X is also a fine choice but at a higher dollar amount and I'm not too sure that it's better than the Savage.

I'm not a Savage fan for hunting rifles but for a long range varminter I could be persueded to buy their gun. They have a new trigger that's really good and trigger is a paramount feature on a varmint rifle. They also have a strong reputation for accuracy.