I’m taking the CZ to the range tomorrow for some long overdue exercise. I bought one of these data books and stocked it with these pages that are ‘cheat sheets’ for using reticle marks as holdovers. I was dreading doing all the math involved and decided to check for any decent Excel ballistics calculator downloads. Found what appears to be a really good one…it does MOA, MILS, prints range cards, and even has an interface for palm computers. Highly recommend! Link and grab “Excel Ballistic Calculator”.