I recently acquired a hod-rodded M10 Ross in .303 that had been bored out to .35 cal. Well I took it out to the range today to sight it in and what came out of the chamber when I ejected the casings... .35 Epps, basically a straight-walled .303 with a distinct shoulder and a big azz bullet. So basically this lands right between the .35 Winchester and the .35 Whelen. I will post some pics when I can.