If "they" wanted our guns, then OSHA did a really good job of hiding that in the preamble to the proposed change.
Nearly all regulations these days are drafted by legislative aids based on the first draft by a lobbiest for the industry being regulated. The explosive manufacturing industry was neck deep in writing this proposed rule according to the preamble. It was refreshing to see that OSHA was clear on the fact that these proposed rules are based on what the industry wanted for themselves.
This means that if there is a big issue once it becomes law then all the explosive companies, and the lobbiest that respresent them, failed in seeing the big picture. It would be hard to believe that these companies would cut off their knose to spite their face if they can make all the explosives they want, but can't sell the stuff. I have yet to see a modern US business sector be that short sighted.
The real issue will be the workplace in a transportation business that has not thought of them selves as OSHA regulated since they were shipping stuff under DOT. DOT makes it pretty clear that they are in charge of the materials, but not the workers per se, once things are moving on a vehicle, and OSHA is clear that they are in charge of the workplace whether or not it is on a building or in the cab of a truck, but they are not incharge of the classification of the material for shipping. So what may happen is an over reaction by the shippers until they get some time under their belts and learn that nothing has changed.
This issue reminds me of when enforcment changed for airfreight shipping after the Value Jet crash. Environmental consultants ship lots of hazarous materials, and in Alaska there are few roads so we shipped by air all the time. We have training to deal with all kinds of hazardous stuff, so we picked up our DOT required 24 hours of shippers training, which made it legal for us to sign a HAZMAT bill of lading. It turns out that the guys at the air freight dock were years behind us shippers in knowing the rules. I remember getting into near fist fights with dudes at the AKAir terminal over the proper shipping name for some of our HAZMAT materials. I learned to come back after a shift change that favored the older union workers and things went smoothly. And then 9/11 happened and the enforcement changed again. The one thing I always keep in mind when working HAZMAT for airfreight is that I don't want to be responsible for another Value Jet like "accident". I hope that the freight dock dudes consider that just as hard as I do when processing a load.