If you go to Hodgdon's website, You'll see that most of the loads for 1 1/8 oz of shot with 800-X are in the range from 21-24 grains of powder. Not familiar with the DH wad; had to look it up....it's a direct WAA replacement,and the highest charge is around 24 grains.
My suggestion would be to reduce the powder charge and retest.
