I asked the same question for the same reason between the 6mmBR and Dasher for the same reason. I want to go to one small cartridge for economy and extra wind drift compared to my 300's but only up to 600 meters. My choice of ranges sharply divide the range distances. If I travel west then all the ranges max out at 600 meters. If I go east then the ranges are longer and max out at 900 meters/1000yards. I shoot the 300's at the longer ranges and love them but see no reason to shoot them at 600 meters or less because at these ranges they aren't a challenge any more. I own both a 6R and 6.5 x 47 Lapua. Both are very accurate but if I go down to one, which is the better choice to specialize in?