I shot only ONE deer, a big northern whitetail with the Sierra 225 BT out of my .35 Whelen. Load was 56 gr. of IMR 4064, about 2650fps if I recall. Range was about 15 yards, broadside. Through the ribs and lungs, just behind the shoulder and exited. Bullet apparently failed to expand at all. Buck ran about 120 yards before expiring. NO blood trail, thank goodness for good snow tracking conditions. Once is a poor test of any product, but it was was enough for me. I don't use those bullets any more.