I have shot 150 grn Rem Express core-lokts in 30-30 for over 10 years now. I have had a pass through on every deer I have shot with that gun, 25 to 100 yards. My dad has shot many deer with the same bullets and has only had one that did not pass through. That shot was at 35 yards through the hind quarter, intestines, stomach, diaphram, liver, lungs, heart, and a shoulder. I found the bullet...intact...just under the skin. I wouldn't shoot anything else.