I recall the link that someone here posted about a year ago under the title "One Million Rounds Per Minute" or some such. I went to the link, and it was an interesting story about how an Aussie inventor had come up with this concept in his basement, and was giving it to the Aussie military.
Apparently, he just takes cheap barrels and stokes 'em with charges and lead bullets, sequentially. An electrical wire runs down the length of the barrel, and fires off the hollow point, hollow based lead bullets. The hollow bases and points expand to prevent accidental simultaneous discharge. The barrels can then be discarded or saved and reused, much like empty magazines.
Problems that I see here: <UL TYPE=SQUARE>
<LI>Lead-bullet ONLY.
<LI>Different muzzle-velocity for each shot down the barrel. Thus, different aim point.
<LI>Changing barrels to reload means changing sight settings each time.
<LI>3-shot bursts are incredibly erratic in a recoilless pistol such as that. I'm not sure what range that demo was being shot at, but 2+ feet separation of impacts from what probably wasn't more than 15 yards means that you're going to get about 6 feet (or MUCH more) of separation at 50 yards. This means shots going wild.
</UL>
Now, to be fair, they did address the recoil-issue, inasmuch as that they're "working on a prototype," which simply means they don't exist yet.
The change in sights could be engineered around, I'm certain.
Hey, this whole concept only came out about a year ago-- this is a pretty big leap. If it works, I don't have a problem with it. We've all known that effective caseless ammo has been the holy grail of the shooting sports for years and years. The only thing I have a problem with is if folks want to REQUIRE that all guns have "Smart" technology.
Pretty neat film clip, though. If you don't have Real Audio, go to
http://www.real.com/ and look around for the free download to be able to watch and listen to such stuff.