Happy to say this bullet did what it was intended, with a great result. In the early morning of the second day Elk season. 680yards, no winds, running broadside with lots of time for dope. The bullet entered on right side hitting a rib 1" hole, through both lungs and exited left side through a rib leaving a 2.5-3" hole. The result, a very nice 5+5 laying within 50yrds. Thanks everyone with the load data for 300 RUM. Scout.