chrono

my field chronos snipers to 450 fps but you can use any weight BB to chrono. i have an upgraded bar-10, which spring and bb weight combo should i use for maximum range? i currently have 130 and 170 springs. would a 170 and very heavy bb's (0.48+) work for under 450 fps? cheers

There have been many attempts to make chronographs for cheap (I originally didn't want to pay $80 for something I would use only a few times), but I have found a way to do and overdo the homemade chronograph. After being inspired by Paintball/Ballistic Chronograph I decided to try and make my...