I don't know about shooting powder
But guano if some of the best organic ferts you can get...some are for veg some are for flower(the one higher in N is for veg)
I use budswel which contains Sea bird and Bat guano and it makes your buds taste way better then chem ferts...just my opinion...
Chenmical ferts leave a taste in you r weed sometimes .Organics sometimes don't even need a flush.
So need more info on that stuff you got...what does it say on the package and the rooting stuff ussually you would start a seedling with a 1/4 of the ussual dose.