I have a crony as well. Has beeen working for me ok for 3 years. Does all I need it to do, show me velocities. My crony seems to work just fine. Set it out 8-10 feet, according to how big of a gun your shooting that day, and make sure your shooting in good light conditions. My crony showed me 2962, 2962, 2964, and 2668 for 4 shots with my dads 7 mag the other day. My 222 has a maximum spread of 10 fps, the good loads out of my 25-06 show me 15 for a maximum deviation. I dont know about most, but my crony has worked for me over the years. I'm happy with it considering I paid $70 for it. You just need to find the real sweet spot to see your deviations go down, or try different powders, sometimes that makes all the difference in the world as well. example being, in my 270 I was using imr-4350 for most my loads at first, but found my deviation was as much as 80fps. I then switched to h4831sc and my deviation was down to 25fps. You can have an accurate load with 50-75 fps, but it will not be as accurate at long range. Usually, low deviation loads are the ones you want to look for in long range shooting.