In my quest to build my dream rifle (338 lapua with timberwold titanium action) I am still undecided about barrel length (although I've narrowed my range). It will be at least 28" but I'm wondering how much longer I can go and still have a carry rifle to hunt with? I will be using the 250gr sierra game kings. Also, since I wont be shooting over 500 yards, what power range scope do you suggest? (I want sufficient power but I still want to mount the scope as low as possible.) Thanks to all who have replied to my postings and shared their insights!