bwaites Wrote:...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.IMO, that's due mainly to concerns about liability. Although most 6.8 gun makers have switched to SPCII chambers and 1:11 twist rifling, there are many SAAMI-chambered, 1:9.5 twist guns still out there. I imagine the ammo makers fear that some dummy is bound to use SPCII ammo in a non-SPCII gun.
A contributing factor is that they're selling all the SAAMI-spec ammo they can produce, so they have no real profit motive to change.
And at least one manufacturer IS willing to make SPCII ammo. See below.
Quote:Even using hotter Spec II loads, do you believe it is remotely possible to achieve the results that the proponents are claiming?Bill, I don't pay any heed to what handloaders are claiming, since there's no way for me to know if their loads are safe or not.
I strictly look at what's available in factory ammo. And in that, Wilson Combat is listing their SPCII loads with 110gr bullet @ 2700 fps from a 16" barrel. That's 150 fps faster than SAAMI loads from SSA, Hornady, etc, a substantially greater difference than the mere 20-30 fps noted by Loubser.