I have a recovered 139 grain Interbond that I launched out of a .280 a few years back. It looks almost exactly like the pic you posted. I have heard spotty reports of accuracy, but it seems to be centered on specific weights and diameters, such as 154 grain 7mm's and 130 grain .277s. The 139 grain 7mm shot well enough for me and I wouldn't hesitate to hunt whitetails with them again.

"The number one problem with America is, a whole lot of people need shot, and nobody is shooting them."
-Master Chief Hershel Davis