05-17-2011, 01:25 AM
That's a good systems description!
It also appears that you see room for a cartridge with a length equal to that of the 7.62X51 NATO.
We should take a close look at one of Stan's long-time favorites -- the .25 Remington necked down to 6mm. One can think of it as a 6.8mm SPC stretched and necked down.
We can analytically demonstrate that the heavier 6mm bullets will have potential from equal or better penetration than the 7.62 M80 round. The smaller diameter has an edge for getting equal sectional density bullets up to higher velocities than do the larger diameter pills. A 100-115 gr 6mm driven at the velocities this intermediate round can deliver will almost certainly be far more lethal that th 62 or 77 gr 5.56 round when similar bullet construction is used.
Also, basing the cartridge on a stretched version of the 6.8 SPC instead of the classic .25 Remington allows about 10ksi more pressure, so performance is more readily attainable.
It also appears that you see room for a cartridge with a length equal to that of the 7.62X51 NATO.
We should take a close look at one of Stan's long-time favorites -- the .25 Remington necked down to 6mm. One can think of it as a 6.8mm SPC stretched and necked down.
We can analytically demonstrate that the heavier 6mm bullets will have potential from equal or better penetration than the 7.62 M80 round. The smaller diameter has an edge for getting equal sectional density bullets up to higher velocities than do the larger diameter pills. A 100-115 gr 6mm driven at the velocities this intermediate round can deliver will almost certainly be far more lethal that th 62 or 77 gr 5.56 round when similar bullet construction is used.
Also, basing the cartridge on a stretched version of the 6.8 SPC instead of the classic .25 Remington allows about 10ksi more pressure, so performance is more readily attainable.