Well, im a lil late, but to answer the question about the .338 Lapua Improved.
yes, it is a big case.
I havent had time to play around to much, with diff powders but so far, BMG 50 has proven to be the best,accuracy wise,but not speed wise.
I want to try retumbo, next.H1000 was no good at all in this case, to fast.
Anyways, its built on a rem 721 long action,bolf face opened up, sako extrator,RKS 33"1 1/8" bull stainless BBL.ultmate sniper stock, versapod,burris black dieomond MD 4-12
With a 300GR sierra BTHP match, and BMG 50 powder, my most acurate load is running out over the crony at 2840.There is plenty of room for speed improvment as the case is showing no preasure signs yet.
With that load, i can stay on a 45gal barrel at 1000meters all day.
I have also shot it at a measured mile, and, to be a reall hillbilly here, i could hit the 49 ford car in the fence corner about 75% of the time.
This winter when time alows, im going to play with retumbo, see if i cant get some more speed and accuracey at the same time.
This thread has sure been interesting reading, i must say, and i think Rich, Garnet, and a couple others have found a new home....its the first thread i open up, to see whats new on, now.
Brian