Noname I was shooting a score match a few years ago in very windy conditions, distance was 200 yards, don't remember wind speed, barrel was a 1:9 twist with 60gr. Sierra's and a near max load of IMR 4895. As I shot a gust of wind started and over the 200 yard course it moved just over 7" to the left of POA, so IMO don't bother with the 60's go as heavy as possible or do what I did build a 6mm or 30 cal. for shooting distance.