I always wait until the last minute to test my broad heads so, I figured I'd get it out of the way 5 weeks early today. I have always elk hunted with Thunderhead 125's and never had a problem. I started at 20yds and worked out to 75yds with no issues, flew the same as my field points. I was "kinda" concerned since I switched from 340 to 350 arrows. Just gotta scout more and get in hunting shape now.