To challenge that the military would have gone to latest technology, I doubt that. If there's anything I've learned from speaking to a number of people serving, from all over the world, is that the military inevitably goes towards the most reliable technology or systems that they can. It doesn't so much matter if it's tanks or vehicles, personal armour, rifles, explosives. What can do the job in the most circumstances with the least amount of difficult. I would suspect that they would have stayed with, on a whole, basic technology and systems, including gyroscopic safeties, chemical fuses and the like. Simple reason, you can't hack a classic. While they have a great deal of technology, many different forms of training give the soldier the potential, ability, to act and continue acting when that technology fails. While electronic warfare plays a large part in Shadowrun warfare, battles, much the same as magic does. The basic art of soldiery would be very much the same in mind.
That hasn't changed much in a while and unless something even more severe than magic, dragons, returning to the world happens, that's not going to change.
The current troubles with the F-35 are proof that design by council works in Russia (RPG 7) not America (F-35).
In theory, I can't accept electrically detonated explosives. That is pure current leads to the chain reaction. In my mind, it's too unsafe, especially since lightning bolts can be thrown about in this world. To a degree, I can accept electrically fired rounds, it's because it's just an electrically induced spark to a propellant charge. Things like Metal Storm, anything with stacked projectiles uses this. I see a source of ignition and a charge. Straight current just doesn't do that for me.
As for EX ammo and explosives, depends on the form, the more stable, I'd lean to no, the less stable, put it to the die, you might be lucky. That's my version of simple, though I try to be consistent with, once I've given a ruling.
I suppose at the end of the day, this thread has been about the type of game I want to run, which I would describe is on the hard side of Hollywood realism. Perhaps even more akin to a simulation than even that.