I recently purchased several air bolts from Thurman several weeks ago, and I finally was able to try them out of my 150 ft-lb sumatra. I set my target 20 yards away and sat down to try out these bolts. I had a very short shooting session with only firing two bolts. The first bolt hit the ground 17 yards in front of me. I adjusted the scope and fired the second one. The bolt hit the target but when I retrieved the bolt, the target arrow tip came off and was buried deep inside the archery target block. I immediately stopped and concluded these bolts were a waste of money. I wasn't going to fire off the rest of the bolts because I knew they would get destroyed. I may try them out to see what will happen but not right now. I don't feel like seeing my money wasted just yet. I going to stick to pellets only for now.