Currently I am working on an update.
this would ensure that you run the latest MS software in Excel.
BfX_U will get the possibility to do scoring on several targets: e.g. BfX_U("300mI";12;"cm") would return 8, as the eight ring on that target has a radius of 15 cm and the nine ring has 10 cm radius.
From BfX/Forum users I got several requests to extend BfX, e.g. spin drift.
Some of you manufactured some Excel software for this.
Please mail me your wishes and the corresponding algorithms.
Please check out www.ballisticxlr.com, you can download my current version from there, it's in Excel 97-2004 format (.xls). There's a very nice spin drift equation there. It's not super advanced in that it doesn't take polymer tips and such into account but it's been good to me out to 1500m with BTHP and A-Max projectiles from Hornady, Sierra, Berger and Nosler.