I think I shot a total of 11 WhiteTails, 8 or 10 hogs, and a Cow Moose with the 250's-300's. Never had one not open. The Moose was a pure through the ribs lung shot at 60 or so yards. The failures I had were at close range (under 20 yards) and it was blowups not failure to open. Don't think I have ever seen anyone with a FTO till now.