Looks like I was misled by some labeling. One box says Dram Eq and no ounces, the other, ounces but no dram. I had therefore, interpreted they were saying the same thing. 
Looks like I was misinterpreting ounces of shot as ounces of powder. 
As I said, I am used to feeding my 12 "whatever's cheapest" so have never gotten into this much. 
Thank you!