Hogdon does not recommend reduced loads with H110 either.
Years ago, I did some experimenting with H110 in the 38-40. (When Hogdon refused to give me data for same.)
What I saw was poor burning at low pressures, then, as loads, and pressure levels increased, wild fluctuations in velocity (More than 200fps between shots). (Likely indicating wild fluctuations in pressure) This stabilized as pressures got to the normal operating range for the powder, which is too much for the 38-40. So, I stopped.
Looking back, it was a dumb thing to do, could have had some serious kaboom.