I put my ballistic numbers into a simple Excel spreadsheet, 300-800 yards. Then I cut it out and lay it on bolt side of my rifle( I'm LH) and cover with clear 3M (only) shipping tape. It lasts a long time and dont look real bad. When I lay down to shoot if I have CRS and need to look up the numbers I just tip the rifle left a bit and there's my numbers. If it wears off or gets soaked when hunting its cheap and easy to replace. A bit childish I suppose but it works great on my LRH rifle and wife's 06 elk rifle.