I'm interested, DD - pictures will show valuable information to those who load - I had similar brass trouble with Pyrodex years ago and merely discarded the brass that had been shot with it.

Too- shot to shot velcoity spreads more than doubled with Pyrodex over real black powder. This shows on targets at longer ranges - ie: even at 200yards, you start to see vertical dispersion due to higher and lower velocity rounds.

I do not know if this happens with T-7.