What does that mean? It has different ballistic curves programed in and you need to pick the one that most closely matches yours? Someone needs to buy one and let us know just how good they work.
When I read this, this was my first thought:
G1 Standard for sporting center fire bullets
G5 For low base drag bullets (boat-tails)
G6 For flat base, sharp nose bullets
G7 For very low drag (VLD) bullets
GL For exposed lead nose and hollow point bullets
GS For spherical bullets
RA-4 Official standard for rimfire bullets
All these different Drag Functions use, of course, different BC "conversion"; and each one of them with the proper Ballistic Coefficient will produce different curves...
Now... I could be wrong! Just my first thought!