I've been using Muzzys for many years with great success. Last year I purchased a Switchback XT, and the Muzzys where grouping well but 2" to the right, I moved my sight just alittle and I was right in there, I also went with BLAZER VANES, and they do make a difference. If I went with expandables I would go with the RAGE 2 blade, but the Muzzys are flying like darts