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Does anyone know of a freight terminal in Virginia or West Virginia that accepts 1.4 shipments? I am looking at doing a 1.4 blasting job that would require material to be sent ahead for me. This...

You can transport up to 1,000lbs of 1.4 or 1.5 without placards as others have stated. The gross weight also needs to be under 10,000lbs (including trailer) or you will need DOT numbers.

Grey powder could be anything, but probably something with Aluminum as a fuel. The bomb tech folks have told me that lots of improvised stuff looks that way.

In general, pyro stuff is considered "low explosives" as it will not detonate above the speed of sound and mostly needs some type of confinement to do that. NM with a sensitizing additive is a high...

Nitromethane is hard to light. I believe it usually has to be mxied with alcohol or gas to actually burn in a regular engine. It does have its own oxidizer, so it is able to get more power into...

I'd be happy to talk privately about this if Dave or someone else wants to work it. The short answer is that very few commercial and mining products can go high-order with just a spark or match.

I think its "official" use is cutting some sort of plastic tubing used in irrigation or whatever.

It was assembled by an EOD guy from several pictures that were released.

So the FBI released pictures of the improvised device found in the suspect's car. I'm pretty sure the firing system is a 1-channel Bilusocn. Does anyone know what the white wire igniters are? They...

Very nice. I've used a similar one for cutting shock tube in blasting:

https://www.amazon.com/PTFE-Teflon-cutter-tube-Allen/dp/B0756D2T73/

It worked pretty well on Visco?

The firecrackers and the large bottle rocket look exactly like the ones we would get in Baja in the early 90s.

Well, California banned sparklers with the metal wires in 1991. So they are at least that old.

I'm sure VOD. amount of gas produced and maybe peak pressure play into what an explosion sounds like. I can say that detcord (usually PETN based) has a very loud, higher-frequency sound that is kind...

Those are cool because you get used to seeing hundreds of tube-launched shots following the same, familiar trajectory during the show. When those launch, they can change direction at different...

It wouldn't surprise me. Mexico makes a lot of pyrotechnic items for mining and blasting. And some of our beloved initiators may even be produced there. So it would make sense for a more...

Right, Brisance is a term that describes "shattering power" but there is no standard measure of it. In general, higher brisance means that an explosive is more capable of cutting things like steel or...

It's probably a couple of factors:

1. Black powder vs flash, which has a bunch of different formulas.
2. Better containment of the explosion (ie. a heavier casing)
3. Critical diameter (not all...

These are fun to make. Get a cordless or air-powered brad/finish nailer and ideally, a cordless hot glue gun. A regular one is probably OK, but it's a little safer to not have 110V around the live...

What it comes down to is that fire departments and police bomb squads don't know anything about fireworks but also are afraid to go get help. Given how the display fireworks industry works, I think...

Blowing up a perfectly good house would be Holladay, Utah:

https://www.firehouse.com/operations-training/video/55021365/antient-dynamite-detonated-in-holladay-ut-house

They did this near San Diego a few years ago. But that guy had YEARS worth of waste, residue and homemade explosives lying all over the property. So I'd say that one was a little more...

Quick, call LAPD.

Is it a reusable talon-type igniter?

Scotchlok connectors also work. You can get a box of them and the tool pretty cheap on Amazon or eBay. You don't need genuine 3M brand for this.

I think this is similar to people who collect old medicine bottles. You can't get away with selling full bottles of narcotics, but the DEA isn't actively looking to arrest someone with a museum...