Well up North you do not have the kind of humidity that we do in the South but watch and see if your impact point does not change from one time to an other with the weather. Also try leaving a can open to give the results of a can that has been open for a time. I am not sure what it was it may even have been a bad batch of powder but when I was using it my groups went from under an inch at 100 yds to 3 inches and when I switched back to Pyrodex in the same range session the group went right back to an inch. After this happened a couple times I quit using the Hygroscopic powders.