You NEED the red shock collars. I shoot a Matrix 380 with the standard Diablo arrows, and Rage 125 grain crossbow-orange in color. I had issues--I actually contacted Rage, and they sent me the red shock collars. I have killed six deer using the Rage crossbow 125 grain heads with RED shock collars with no issues at all. I tested, and wasted three heads using them--NO--absolutely NO pre-deployment using the RED shock collars. Get them-you'll be just fine then.