I have used Black Mag'3 in several forms. It has been improved over time and the clumping is pretty much a thing of the past now. I had good results both for cleaning and accuracy in my Omega which refused to shoot Tripple Seven without the worlds worst crud ring. Black Mag'3 shot multiple shots well in the Omega. Harvested one elk with 90gr. BM3 and 300gr. sabot bullet with complete lung shot pass through at 100 yards. I also agree that in rifles that will shoot Black Horn 209 and ignite reliably there is likely no competition. However, there are several that will not including my brand new KRB7. None of the percussion cap rifles will shoot BH209 either. Black Mag'3 is almost as easy to ignite as Black Powder and if I remember it is even easier to ignite than T7 and about the same as Pyrodex. My only complaint about Black Mag'3 was the lack of availability which still seems to be a problem with them as I can get BH209 at Sportsmans Warehouse and I just saw some at Bass Pro although their price was $4 higher than Sportsmans and still no BM3. Late addition: Other rifles that will not shoot BH209 include: NEF Huntsman or Sidekick, most if not all of the Whites, Many of the Knight disk rifles are hit and miss, any rifle shooting any of the conicals that do not fit very tight. Apparently BH209 requires very positive sealing at the breech, very tight projectiles, very solid compacting of the powder, and a short and fairly large fire channel in the breechplug. T/C Omega, Triumph and most of the CVA break action Optima rifles seem to be doing well with the new powder.