He's looking for recommendations on barrel, reamer and brake manufacturers not whether he should go shorter or longer than he seems to be wanting. Unfortunately many times when you come to these forums, you get told what you need and don't need by guys that don't even know you. Bartlein and if you can find a Broughton barrel, they are two good options for the 338 LM barrel as well as other good makers. For your range an 9.3 twist is great for the long heavy 300+ bullets. Muzzle brakes and more makes good reasonable priced brakes in 4-5 port. For a reamer JGS has prints of the 338 LM improved reamers. Just need to decide on freebore, neck size basically. If you have a 26" barrel already, I'd chamber it up and use it. See what it does for your desired range needs and go from there.