I am loading some 180gr. Nosler Partitions for my 8 3/8 inch S&W 686.

My Nosler manual lists H110 from a starting load of 12.5gr. to a max of 13.5gr. The bottle that the powder is in lists the H110 at 13.5 max also.

I lists the 296 loads from 12.0gr. to a max of 13.0gr.

The H110 loads are faster so I chose this for my powder.

Now the question...I have a magazine called Reloading and it has one article in it about powders. It is from 2009. This magazine says that H110 and 296 are the exact same powders and come from the same spout then given a different label.

How can they be the same yet the Nosler manual and the bottle of H110 has a .5gr. difference in loading data from the 296?