I am getting ready to start load developing for my 7mmWSM,and I plan on chronographing each shot just so I know what's going on during the process.I currently have a $100 chronograph(PRO CHRONO DIGITAL).I am not sure how accurate it is.Would I get more accurate readings from a more expensive chronograph like a CED($200),or would I just be paying for extra "whistles and bells"?I don't care about all the extra little features,I just want to get accurate readings.Any input would be appreciated.