Terjeness,
It sounds like you better listen to Sambo, I am not familiar with the 338KT and wrongly assumed it was pretty close to the 338/378, apparently it is not. The 338Khan is close enough in case capacity that loads for it and the 338/378 are pretty much interchangeable. The loads I listed are top end pressure wise for my 338Khan so even backing off 4 or 5 grains may not be enough. Maybe Sambo can find that magazine article or someone more familiar with the KT can make some load suggestions, but don't try my 338Khan loads. Sorry, my bad.