06-30-2013, 07:06 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
If we merely wanted to out perform the 7.62 NATO, the 260 Rem (6.5x51) does that now using the same case. The 260 Rem might be the starting point for comparisons. Then the process would be creating a smaller case that has similar performance. One might want to have a bullet that is similar to the M80. Maybe a FMJ lead core for comparison tests.
Also there is a need to have something other than a brass case as it is just too expensive to leave on the battlefield. So part of the design is a plastic (polymer) case.