I run 115 dtacs out of my 28 inch barreled 6x47 at the same velocity I run 115 dtacs out of a 25 inch 243AI. Both are right over 3150 fps using vv 560 in both. There is not really an advantage over the 243 Ai unless it is the toughness of the lapua brass and the lack of fire forming. I have blanked primers in 6x47 brass without ruining the cases. The necks of the 6x47 lapua brass needs annealing before the primer pockets get loose. Since I do not anneal my match brass I neck it down to 22x47. Now that is a great little round....think 220 swift with lapua brass.