Here's some more.
Caseless ammo doesn't work, and serves no actual purpose.
You don't need an ejection system.
Isn't that special, how are you going to clear a jam or unload when you're done shooting ?
Maybe a computerized ramrod ? ( that is sarcasm)
One of the biggest problems is cracking, chipping, and breakage of the exposed propellent that causes the afore mentioned jams, as well as turning the bottom of your magazine into a pipe bomb.
Supposedly Germany had a choice between following through on the overhyped HK G- 11, or rebuilding East Germany.
They picked the cheaper option of rebuilding the East.
The only way I see it working would be a multi metal rocketball design.
Previous caseless experiments mean they already have a usable self combusting primer design, so you stuff the propellent into the bullet composed to maintain ballistic efficiency, and allow the placement of an extractor groove at the base.
With enough thought put into the bullet design could almost allow for use in unmodified guns.
Bullets would be expensive, because weight has to be managed to allow enough length for the propellent charge while keeping the most efficient balance for stability.
My notebook might be right handy, but I can't put foot notes like this
https://www.youtube.com/watch?v=QGKcvM2Hh4ghttps://www.youtube.com/watch?v=2Owogu_un7shttps://www.youtube.com/watch?v=RZBHTOYHY6Y The subject is primarily military rifles, but IIRC the pistol video had more detailed ammo design information.