I'm surprised that you guys have had troubles getting Interbonds to shoot accurately. In my two custom 280s, the 140 gr. IB shoots sub-MOA in both. In fact, it is one of the most accurate bullets I've used in those two rifles. I can't really address the penetration issue as I've only shot one animal with them, a pronghorn antelope at the Lander one-shot last year. The "goat" died instantly. I haven't done any bullet tests in several years now, but I don't recall the IB particularly lacking in penetration compared to other bullets in its class.
TT
