Re: 6x47 lapua 115 loads
The 6mm crusader will push it faster, but I don't think you can use the extra horsepower. I have a good friend who shoot his 6x47 at 600y benchrest. He told me if he pushes the bergers to hard they can fall apart. I read the same thing about the crusader. Out of the 6x47, 6mm lr, and 6x47 lapua, the lapua requires the least brass prep IMO. All three will push the heavy bullets to there max. I went with the lapua for less brass prep, lapua brass, and shorter coal.
I'm no 6mm expert, and I'm sure there are quite a few people here who could give much better info on choosing one of the three. This is just my opinion.