I bought a 8 lb. "clorox bottle" of River Valley Ordnance .30 Cal. M1 Carbine gunpowder at a gunshow 2 weeks ago for $45.00. The only info I got with it is "Carbine Powder WC820 - similar to 2400 in .44 Mag". Has anyone have any experience with this powder? I want to use it in M1 Carbine [long gun], .41Mag & .44 Mag. pistol.