I've finally decided to leave the drop charts at home and start running a ballistic program in the field with a PDA. I recently picked up a PalmOne tungsten e2 and I've started looking everywhere on the internet for a ballistic program to put on it. Most of the forums on here talk about the Exbal program by Perry Systems or the Nightforce version of the same program. I've tried buying the program from both of them and they both tell me that they have discontinued their service. What other ballistic programs are available that can compete with exbal? I really like Gseven's program and I use it for all of my drop charts and have had amazing results but I'm not sure if they sale it. Or possibly does anyone have a copy of exbal and are willing to share? Everyone's expert advise is much needed!!