So my son and I did a little long range shooting today. He is shooting a lefthanded Rem 700 with a Rock barrel on it. Total weight with scope is about 8.25 pounds. The load it seems to like is a 180 berger and he has a 3.5-10 Leupold on it. 7mm remington magnum. The JBM ballistics software seems to be spot on and come ups were perfect at our 8500 feet elevation. He put 3 into 7" which seems pretty good to me at 854 yards and off a bipod laying prone. They were about 4" right of bullseye. Fickle winds seem to be our biggest challenge with this long range stuff. In the hills they seem to go one way for 10 minutes, then twist around the other direction. I will say the 180 bergers minimize the movement but the wind is our enemy at this distance. We'll keep working on that however the vertical seems to be pretty easy to overcome with good clicks and good software. Regardless, fun day and way better than shooting off a bench at 100 yards.