I have been using my Weatherby Accumark 338-378 for about 10 years .It is awesome.The 250 Nosler Partition bullet at 3100 fps is the ticket for big bears out to 400 yards andmoose to 500 yards.Most of these 300 gr bullets are match bullets not designed for hunting.I had a friend shoot two caribou with one shot with my gun at 450 yards.It killed both of them like a mack truck had hit them.The 338-378 adds about 200 yards to what the 338 win mag would do.I hope the 338 lapua is chambered in some lighter guns such as the weatherby Accumark.I want a gun under 10 pounds scope and all.Your not going to lug these 20 pound guns very far.The 28 barrel with the break on my 338-378 is way long enough any longer and its a pain to carry on the tundra.I love the Weatherby Accumark it is the best hunting rifle I have ever owned.