Guys, I've discovered a few things over the years of using this stuff that will prevent a successful detonation.
Proper storage before it's use and purchase is important. Storage in a humid environ will affect it negatively. If the prills are clumped together you need to separate them(before mixing of course) so the mix will be consistant. Even grey color throughout is good.
Empty the prills into the provided container to do the mix. If you try to use the target bottle to do the mixing, you may not distribute the catylist evenly, ending in a failed detonation.
For some reason detonation becomes erratic on humid days, I've experienced a few no-go's on humid days even using .223.
More failures than not for me have been with 7.62x39, so I use .223 or .308 exclusively now.
Adding the proper amount of catylist is important to consistant ignition.
Making sure the projo goes through the bottle square rather than "winging" the empty portion is important.
For those inclined to experiment, remember if you pour the "target bottle mix" into a metal container or any other container other than the plastic bottle it it came in.. you now have an untaxed destructive device and you are subject to more fines and jail time than you'd be interested in.
Also the burn rate on this mix is around 21,000 fps, think you can duck fast enough to avoid the schrapnel coming at you? I wouldn'y try it.
Please use this stuff responsibly so you don't ruin it for the rest of us. Some of the most deserving Darwin Awards go to irresponsible tannerite users.
Have fun but above all be safe!!