It's a new one on me also.
cysnake, please heed SL1's warning - do not
use Silhouette load data with anything labeled 296, it doesn't matter if there is the term "WAP" on the same label.
Note on the following burn chart where both Silhouette and (the real) WAP are, numbers 42 and 43. Now note where 296 is, number 72.
Winchester 296 (and H110) are in the handful of powders you should not attempt to download. If you use Silhouette data, I think that is what's going to happen - big time.