When I was escorting deer and elk hunters here in Colorado, quite a few showed up with this caliber. I only remember 1 bull that escaped after being hit. My guess was poor shot placement as the young kid doing the shooting was a poor shot and easily excited. I seldom have the luck others have with instant kills. Estimating half of the elk I have shot and my guest have shot had to be followed up and finished off. Nothing the caliber or bullet caused. Just poor shooting or bad angles. Never got many of the classic broadside shots. I have always preferred the Nosler Partions for everything from jackrabbit to elk.