feed back wanted on Shooters World black powder sub

[dpkdavis]

I live 10 miles from Midsouthshooterssupply and can get Shooters Word Black powder substitute lose or pellets, they always have it and its only 21.00 a pound, I plan on shooting it in my Lyman .50 great plains precussion rifle, i have been using triple 7 in three f, thanks for any feed back