Well I got my Impact a couple of weeks ago and have had some time to tinker around with it. I had a little trouble getting my scope mounted but after a little modification to the mount she slips on and off with zero change in POI. Straight out of the case it was shooting the 47 grain pellets about 865 and the 50 grain pellets about 855 give or take a little. I noticed at 50 yards at these speeds my groups with both pellets where a little larger than I'm use to seeing out of an Fx rifle. They where 1/2 to 3/4 of an inch. After a couple tins of pellets of both weight I found the sweet spot that my rifle likes for both weights. It seems about 828 to 830 fps is what it likes. I went from 1/2 to 3/4 inch groups to pellet on top of pellet at 50 yards. The weather has been windy here this weekend so wasn't going to shoot but I couldn't resist getting out and letting some lead fly. I shot 10 rounds of the 50 grain pellets at 100 yards ,of course the conditions where not perfect but I shot two 1/2 inch groups. I know they can be better just have to wait for the conditions to improve. I will post pics once weather improves.