Thread: 300 win mag

Is there a particular weight,grain with the 300 thats better for longer distances, shot 3 different bullets sighting in and the 165 sako was the best. I want to shot out to 600-700 so would i be better going for 180 or heavier for that distance for knock down power or stick with the 165 since it shoots well. Cheer in advance for any info.