Genuine Performance

Im using the UPS shipping contribution with Creloaded 6.15 and all I have to do is insert the weight and it comes up with a shipping price... Is this always accurate? How does it figure this out without any dimensions?

im using oscmax and I have this individual shipping mod installed however it only works when the item has an attribute, if the item does not it skips the whole shipping step and checks out without charging shipping... does anyone know why it may be doing this? Thanks! Bryan www.genuine-performance.com/catalog