posted on Jan, 29 2014 @ 07:09 PM
Caseless is very likely a dead end, for a full auto weapon anyway.
AAI, advanced armaments industries, proto typed a caseless rifle on the mid eighties. They actually won the initial procurement competition for a
new battle rifle for the marine corp. The design used a hardened steel flechete molded into the propellant. They had good initial success, but there
were issues with the propellant cooking off under high rates of fire, and since the mechanism is designed for caseless the was no ejection mechanism,
so if a round misfired there was no easy way to clear the chamber. Priming the round was also a problem, as it has to be electronic, no cartridge no
place for a chemical primer.
It started as a good idea, the case is 30% of the weight of a round, so caseless gave the opportunity to carry 30%more rounds on the average
As far a a shot gun goes , it conceivably could be done, the same issues i laid out above would apply. Also there would have to be a way to form the
shot cup into the propellant in such a fashion that it would not compramise the integrity of the round.