@Baraban I think the main issue is heat transference. Currently the casing absorbs a lot of the heat and its ejection removes that heat from the gun, reducing the total thermal buildup inside the gun. Without the case to act as a heat sink, rapid fire becomes an even more serious overheating risk. Which is too bad, as one of the big advantages of caseless ammo is less time having to chamber and eject rounds/casings.
