I gotta Research. Yes. If you read the fine print, Black MZ is included in the Patent information for APP and as far as I know, same Mfgr??? However:
For the last year or so, I have been hearing Black MZ has been or is being discontinued. I cannot personally confirm nor deny. I need to ask around at the top of the food chain. Watch this space.
For Eyes: Yep. WM 1 is entirely correct. Black MZ is almost factly same same APP. Same loading, same clean up, same NO LUBE. Not necessary to compress. Still ...... Leave NO Airspace. Load or use filler to the base of the projectile.
Just to help a little more. BP is Cumulative. The amount of fouling increases with every shot. Without swabbing, a 10 or 12 stage match can get really ugly. APP and Black MZ are singular. Each round you fire removes the fouling from the previous shot. If however, you are shooting with a rail road tunnel for a chamber, and you are not annealing, the chamber may well foul out.