I'd stick with the ones your using now. I still use the 100 gr. 2-blades and they work fine. The biggest advantage is the accuracy factor with mechanicals. Over the years they have perfected the "issues" about some not opening properly. That's where the Rage brand shines!!! Never had a fixed bladed head fly worth a darn. Remember, a bad hit is a bad hit, no matter what head your using!!! So don't blame the equipment on a bad shot!!