just work up a load with the new powder. if it is all you can get, make it work.
As far as I know the plant in Brazil that was making the Diamondback black powder closed. When the S/A Pernambuco Powder Factory ceased operations some rich young guy in Brazil bought all of the machinery and "technology" and built a new plant about 50 miles down the coast from the old shuttered plant. Took him awhile to get it set up and running. But by then Schuetzen was on the U.S. market. The owner in Brazil got together with Copperhead Chemical Company in Tamaqua, PA who formed this Diamondback Powder Company using the Copperhead pharmaceutical -grade nitroglycerin plant as their base of operations. That plant previously owned by ICI who had purchased it off Atlas who made dynamite and black powder at that plant. But it gave Diamondback plenty of big storage magazines.
When the first container of the Diamondback Powder came up from Brazil it was November. Diamondback tried to get the then owner of Maine Powder office to become their primary distributor. He told them only if I gave my seal of approval. So they invited me up there for a day of testing. I was to sit in a lawn chair about 20 feet from the shooting table. I was to say nothing and touch nothing. They had brought a shooter up from Texas to do the testing. The day of the testing was nice. Wind gusts up to 45mph with lake effect snow blowing around. I opted out of that. Spend a day in a lawn chair wrapped in a heavy microfiber blanket. I was not allowed to touch any powder cans nor would I be given any to bring home and test.
About a week later I got a call from Chuck Dixon. I was to go up to his shop and pick up a can of Diamondback 3F to check out. Brought it home and took some apart. The same Imbauba charcoal as in Elephant. Then they were going to price it right up there with GOEX and Schuetzen. Even if it equaled the no longer available Elephant it would not really be competitive. And it was made clear they would not drop the price.
Then I had a call from the head of the Copperhead Chemical Company in Canada. Asking me to help him with the Diamondback powder. That was a Thursday one week. My wife and I spent Saturday and Sunday out on long bicycle rides. Monday morning he called and got rather nasty that I had not spent the weekend on his powder that I was not charging him for. So I cut all ties with that crowd. So that killed the meeting between myself and the owner of the powder plant in Brazil who wanted to spend a few days up here picking my brain on charcoal properties to look for.
The plant in Brazil desperately need the U.S. market to keep the plant profitable in Brazil. That just did not happen.