I have been handloading these for my CZ 550 and got some loads that shot very well at 100 yards with groups much less than an inch. I decided to shoot these loads at long ranges of 200 and 300 yards and was horrified at how much they opened up. I do not know it is me, my rifle, wind that day or what but I was lucky to keep them in a 6" circle at 200 yards. It wasn't gusty that day, maybe 10 mph wind once in a while. I felt certain at my shots. I am nto sure what is going on. I would expect a 1" group to translate into 2" at 200 yards and 3" at 300 but this didn't seem to be the case.