Please feel free to respond on thses thoughts.
Glad to engage in a debate of ideas.
1. Caseless ammo will be the next step. The cost of metal will be the driver.
I would disagree, the main problem with caseless ammo is that any savings in metal is more than offset by the increased cost of the manufacture and raw materials of the caseless ammunition.
The cost problem has been effectively solved by the use of steel cased and steel core'd ammo, as the metal prices below show.
October prices per ton:
Carbon Steel: $800
Copper: $7,040
Zinc: $1,734
Lead: $1,792
Aluminum: $1,920
Steel cased ammo is simply too cheap to make caseless ammunition economically viable, though it can always be a choice because of space or weight reasons, though I think those situations are few and far between, The Soviets put a 23mm cannon on their spy space station and even that used cased ammunition.
2. Pollution from the bullet. Metal bullets will be replaced with a ceramic. They are harder than metal and do not pollute the runoff water from ranges.
I would argue that the pollution threat is greatly exaggerated and on the list of "things we need to worry about as a society" is somewhere around, "are we eating too much garlic." It's an issue, but not one that is especially difficult to solve.
As for ceramic, no way that is happening. Ceramic is brittle and won't stand the force of firing down a rifled barrel and your barrel wouldn't last an entire magazine. They have been trying to get ceramics durable enough for engines and even for that task they can't get it to work.
3. Packaging is a major issue. The bullets will be packaged in a plastic magazine. The top will be removed the spring activated when the magazine is inserted into the weapon. This will also protect the "delicate" nature of the caseless ammo. Magazine Pouches probably be designed to remove the top closure when the soldier removes the mag from the pouch.
Since I don't think caseless ammo is gonna be coming, there's nothing I can really debate about on this one.
4. Smart bullets and exploding rounds will be limited to grenades. The current 40mm will be replaced by a low velocity round in the 10 to 12 gauge range. They will have the ability to fly around corners or air burst after they clear a barricade (above or through). Simliar to the effect of quick or superquick fuzes. Mortar and Artillery folk will remember those settings.
They tried that with the XM-25 and found that even limited to only a compact impact fuse, the 20mm grenade was not lethal enough to reliably incapacitate infantry. Sure, if you have 25 of them incoming, like with an airplane cannon, then it certainly can do some nasty stuff.
They could certainly do that sort of stuff with the 40mm grenades though, except for the flying around part. The guidance and propulsion systems couldn't be shrunk down far enough and even then there wouldn't be any reasonable way to control or detonate it where/when you wanted it.
5. The rifle will look something like the weapons used in the Alien movies.
Could be.
6. The smart bullets will have the ability to identify the target by a body signature and will follow the target until it hits. This round will be launched and an internal rocket will ignite and propell it to the target. Issue will be limited to Spec Opertators for specific missions.
You've been watching the movie "Runaway", haven't you? (Don't be afraid, it was actually a decent movie.)
First off, there's no way to fit a camera or sensor into something even closely resembling a rifle bullet that has the resolution to identify an individual at range. Basic physics in regards to optics puts the kibosh on that idea right away. You MIGHT be able to fit a camera into a 40mm, but the best it could do is be told to "kill that blob over there" and the guidance system would take up so much space there wouldn't be space left for explosive.
Thanks for the thoughts, hope we can get some good discussion going.