Stan, I mention the 6.8 because of this statement:
AND...even though a SAAMI cartridge was used in the Remington test, we aren't sure at all what was used in the AA/Ramshot testing. We do know that Dr. Roberts and Johan Loubser both say that no significant difference was found in using a SpecII chamber when it came to pressure differential, and Dr. Roberts says that he is aware of NO test which demonstrates that, in any testing facility, either commercial or military. It is beyond my belief that if that that extra velocity was actually there that no one would have been willing to load that ammo, especially considering they already had the setup to do so, IF that performance was available simply with a chamber change.
Even using hotter Spec II loads, do you believe it is remotely possible to achieve the results that the proponents are claiming? To achieve 200 FPS increases with 30 caliber bullets you have to go from standard to magnum cases, ie. from 30-06 velocities to .300 WinMag velocities. That means A LOT more powder, not the couple grains or faster powders that the 6.8 proponents propose is available simply with that chamber difference.
There is one exception, and it took Hornady quite some time to develop, and that is by developing a unique powder with specific properties, that appears to improve the performance of at least some cartridges to near magnum levels in standard cases. Even then, though, the promises are not so excessive as what the SPCII chamber proponents advocate are possible.
stanc Wrote:Very true. Even the underpowered loads from Remington deliver flatter trajectory than that of 7.62x39, and SPC II ammo provides a significant overmatch.
AND...even though a SAAMI cartridge was used in the Remington test, we aren't sure at all what was used in the AA/Ramshot testing. We do know that Dr. Roberts and Johan Loubser both say that no significant difference was found in using a SpecII chamber when it came to pressure differential, and Dr. Roberts says that he is aware of NO test which demonstrates that, in any testing facility, either commercial or military. It is beyond my belief that if that that extra velocity was actually there that no one would have been willing to load that ammo, especially considering they already had the setup to do so, IF that performance was available simply with a chamber change.
Even using hotter Spec II loads, do you believe it is remotely possible to achieve the results that the proponents are claiming? To achieve 200 FPS increases with 30 caliber bullets you have to go from standard to magnum cases, ie. from 30-06 velocities to .300 WinMag velocities. That means A LOT more powder, not the couple grains or faster powders that the 6.8 proponents propose is available simply with that chamber difference.
There is one exception, and it took Hornady quite some time to develop, and that is by developing a unique powder with specific properties, that appears to improve the performance of at least some cartridges to near magnum levels in standard cases. Even then, though, the promises are not so excessive as what the SPCII chamber proponents advocate are possible.
You seek escape from pain. We seek the achievement of happiness. You exist for the sake of avoiding punishment. We exist for the sake of earning rewards. Threats will not make us function; fear is not our incentive. It is not death that we wish to avoid, but life that we wish to live. - John Galt