I have shot GrimReaper 1-3/8ths cut 100grn Razor Tip since they have came out. GREAT entrance and exit holes. Have never had one fail. They can not open in flight due to the spring holding them closed till they meet resistance. I have taken hogs, deer, bear, elk and a near world record Catalina ram with them and would never own another breadhead even if they were given to me for free!!!!!!!!! I have a cell phone pics of a deer I shot 2 years ago at 54 yds, heart/lung entrance, hit brisket entering, exited just behind left shoulder, leaving a 5" diagonal exit hole!!!! Could put your hand into!! Never broke a blade. Shot a huge So. Il buck several years ago directly in the spine, drove the head 8" through the vertabrae, and only broke 1 blade!!!! Thats a tough broadhead!!!!!!