Im assuming that the casings cannot be reloded, due to the weak structural intrgrity of the plastic, and the lack of conforming to a new specific shape when pushed into a resizing die. I also wonder if they are boxer or berdan primed. Ive seen them before, but Im not sure if theyre made out of a harder polymer. Ive reloaded alot of steel casings before, but never any that were partly plastic.
Im wondering if the plastic is only on the outer circumfrence of the casing, and there is still brass running a substantial way up to the neck. Becase having the base of a cartrige a seperate piece would create a weak area where it connects with the plastic case. This might cause a roblem in rifles that require blowback power to work the action such as the hk/g3 series. They rely on a short powerful rearward thrust of the casing on firing to unlock the bolt. After the gas pessure in the barrel is low enough, the remaining recoil of the cartrige pushes it rearward. Im not sure if thew make them in .308 but in the case of the hk/g3 series, the brass base combined with the weak tensile strength of the plastic put in a high pressue extraction point may cause the base to actually blow off of the plastic portion.
