I'm sticking with my 100 grain Wasp Jackhammer mechanicals. I started using them 5 seasons ago and of the 8 deer I've killed since, I only had to track 2 of them. The others fell within eye sight or I heard them go down and walked straight to them. I've had simular results with a fixed blade but I changed to a faster bow and my fixed blades didn't fly as true. It's really all about shot placement.