break down any cartridges loaded with this & then discard all the powder............ from this entire lot. to do anything else is to court injury, death & the ruin of a firearm.

I'm going with powder that was contaminated... either in your measure or if it wasn't sealed... before you got it. I've never bought TB, does it come in sealed cans? Did you buy this powder from someone who broke down an 8lb jug into smaller lots? As I said, I'm leaning towards you accidently contaminating this powder.. the manufacturing process has steps to preclude this type of incident. 100% empty and virgin containers that are then filled..

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be safe,enjoylife,journey well