The 6.8SPC was produced by Remington from a request of a Special Forces Unit. All military requests to industry are outlined in what's referred to as "requirements". These requirements are detailed and force the contractor work with them. The 6.8SPC being for a military application had a requirement to hold a specific number of rounds in the magazine. This magazine requirement limited the brass size of each case. Remington needed to design a round within these limitations. The smaller brass size limited the amount of powder grains that could loaded and therefore the velocity of the projectile. Taking the same bullet the .277 (270) without the rounds per magazine limitation opens up the possibility for large case size and therefore more powder and higher velocity's. In other words nothing surprising about getting 200fps higher than the 6.8spc which is designed as a military round NOT A HUNTING cartridge. The wildcat case (based on the 6.5 lapua) will hold 10 more grains of powder and therefore 200fps improvement is a conservative number. There's no reason to believe that the developer is faking numbers but I think hes probably being conservative in his estimates.
