I've owned a Matrix 380 for about 5 years now and never bothered to get it chrono'd. A while back i was able to pick ip a good chrono real reasonable so today i thought i'd give it a whirl trying out the CenterPoint 300 Volt i bought the 8 year old grandson for his birth day. To my surprise the Volt chrono'd at an average of 301-304 fps with the factory bolts and 100 gr Dead Ringer Hyper Strike 3 blade fixed broadheads. So just for shits n giggles i brought out the Micro Nightmare 335 and with 16.5" BE Executioners, Ignitor nocks and brass insets (total 298 gr with tip) and 125gr Swackers, the best it would do is 292-298 fps. i switched to the 100 gr Dead Ringers and could only squeeze 304-307 fps out of it. The Micro has Air Brakes, Reds, and two small limb dampners and i knew i would loose some speed, but not that much. Now for the really scary part. I took out the Matrix 380 on which i recently put the Excal SDS system on it. It already had Reds and Air Braked on it, and with 18" BE Executioners carrying brass inserts and Ignitor nocks ( total 318gr without a tip) and using the same Swacker 125gr heads, the beast i could get is 300-305 fps. I switched to the 100 gr Dead Ringers and 309 fps was max. i checked the brace height and both are spot one. So, WHAT HAPPENED TO MY SPEED ?