Re: 5000 meters+ Supersonic
Nope, the tungsten projectile weighs about 310grains... the rest is the discarding sabot. A main focus in all modern smoothbore development, aims to reduce the sabot weight as much as possible so that less energy is wasted. This means higher velocities for the actual projectile, and higher energy downrange.
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: saojao</div><div class="ubbcode-body"> Where is the astonishing BC? It says effective range 1,000 meters max effective range 2,500 meters....Also the projectile weighs only 550 grains! </div></div>
Not trying to rain on your parade, but have a look at the trajectory... its arc is 800mm over 1000m, this a fancy way of saying it drops 1600mm over 1000m.
They do not list a BC for the fin stabilized projectile, but assuming you had the same velocity with the GSC BC=2.1 @ 4800fps, yours would still drop more @ 1900mm. So clearly the BC of the fin stabilized projectile is much higher than 2.1.
Now let look at your actual figures assuming BC=2.1 @ 3300fps from this cannon of yours... it will drop ~4010mm @ 1000m, thats about 2.5 times as much drop over the same distance and it will be exponentially worse as the distance increases because you have lower velocity AND lower BC.
Whats more important, rather than the drop, is the time of flight, and therefore its effectiveness of actually hitting a target beyond this distance...
Your rifle will have a time of flight of ~3.5sec @ 3000yds. The steyrs APFSDS is ~2.0secs.
Yours cannon will still carry more energy at this range, but who cares if you cant hit anything but a completely stationary target...?
Your using old technology to develop a new weapon, good luck with that...
