An apparatus and method relating to a cased telescoped ammunition assembly configured
to be fired from a firing device. Under one aspect of the invention, a cased telescoped
ammunition assembly includes a combustible case body and noncombustible end caps
connected to opposing ends of the case body. The case body is configured to be
substantially consumed in combustion when the ammunition assembly is fired. An
internal support structure is positioned in the interior portion of the case body
and connected to the end caps. The internal support structure and the end caps
define a load-bearing unit that provides a load path substantially independent
of the case body. The load-bearing unit is configured to react external loads,
such that the combustible case body is substantially isolated from and does not
react the external loads.