AB Connect™ Library Version 758 was recently released. The way AB Connect™ functions is that the first digits indicate the Library Number (Number of Bullets) and the last 2 digits indicate the Revision Number. If an update is needed but no new bullets are added, the system will sequence up one revision number example ###00 will become ###01 if bullets are updated but no new bullets are added. If a new bullet is added the library version number will increase to match the number of bullets for example if the library went from 800 to 810 bullets it would be 800## to 81000. The below are change logs, not bullet libraries. For the complete library you can download this PDF: AB Bullet Library. Here are the changes: You can see the change log here: http://appliedballisticsllc.com/AB Connect Change Logs/75801.pdf You can download the full bullet library here:http://www.appliedballisticsllc.com/Downloads/ABLibrary.pdf Bullets can have different performance from lot to lot due to changes in tooling and machining. This is why we vigilant and constantly testing to see if the drag model information needs to be updated. In reality different bullets in the same box will have slightly different drag characteristics which is why we test 20 bullets or more from each lot then provide an average. These are the results from our latest testing. These are not "corrections" to the app as some have stated in the past. These are corrections to the drag models to reflect the most current lot of bullets produced by the manufacturers.