I have a mac laptop that I would love using both in the field and at the reloading bench. I have used exbal, but it is not being made for a mac. Therefore I am in search of another program, if there is one on the same level as exbal. I know that the RSI shooting lab is written for the window system too, and I am wondering if anyone has used this ballistics program. If so, how accurate is it and how well does it perform. Any help would be greatly appreciated. RSI Shooting Lab is their website. There is a 30-day demo if someone would download it and look at it and tell me what they think about it.