Both H-110 and 296 are manufactured by St.Marks Powders, formerly Primex Technologies. Several years ago, before Hodgdon became the distributor for Winchester powders, I contacted what was then Primex. I spoke with a production engineer and asked him specifically if they manufactured both, and if there was and difference in specification between them. This was before it was general knowledge that they are identical. He was somewhat hesitant, since this would have been proprietary information, but finally stated that they were identical to the point that shipments to both Winchester and Hodgdon can come from the same production lot! You can't get any more "Identical" than that!!!!!!