I need to check a bit further when it comes to the full settings, but the general idea is that 1x scopes has a 0.6 modifier to the sensitivity (meaning it's 0.6x slower), so when the aim sensitivity reaches 1.666666 the modifier is canceled out (1.666666*0.6=1), and it won't go above 1. When you multiply the default value of the xfactor (0.02) and 83.333333 you get 1.666666. When you use different values I need to check exactly how it behaves however.