06-30-2013, 05:35 AM
mongoosesnipe Wrote:so what your wanting is to take a cartridge like the 308 and trim it down to say 47mm so that we could use long high bc bullets in a 7.62 NATO mag well, neck it down to 6.5mm such as to get a little more velocity or less recoil than 7mm or 7.62 bullets of similar high bc and put a very efficient shoulder on it for accuracy and then build an entirely new platform to shoot it out of...
if the goal is weight savings and performance and you want to design a new metallic or polymer cartridge to do that imho your already doing it wrong you may be able to save a few grams with a conventional case but if your starting from scratch i would go caseless
That last image is simply there to illustrate what extrapolating the 5.45 7N6 form factor would look like when placed in existing cases. It demonstrates the importance of case length and diameter and how they affect COAL, which will determine action length of the weapon and magazine size. Every single one of those examples exceeds the current magazine dimensions for any of the intermediate cartridges, with the possible exception of the new Chicom 5.8x42mm.