Crab, I loaded ammo for a friends '06 BAR for his Shiras cow hunt this year. Used medium load, old gold 200gr part. SS, I-4350, CCI 250 mag and new RP brass. He shot her through the ribs, one from each side and both bullets recovered. The recovered weight (171 gr.) expanded dia. (.605") and expanded length (.761") were well within 1% of each other. Both were under the skin on the opposite side of the entry and each broke a rib. She was at approx. 80 yards when shot, use any partition. Muddy