I've started doing all my gear from powder. You can set your own potentcy of the gear. Also, you know it's good and clean. As far as powder sources, you can almost bet that MOST sources that sell gear won't sell powder. They would be putting themselves out of business. There are, though, several domestic powder sources available. If you're a gambler, the international powder sources are 4 or 5 times cheaper than domestic. The only problem is getting in the country thru customs.