Had access to an Infrared thermometer yesterday while shooting my Ultra 9 on a couple of guns. Thunder Beast lists the maximum temperature of 800 degrees. I don't think I have ever been anywhere near that and don't intend to try. So on my 11.5" barreled 223 AR I shot 10 rounds pretty quickly and got a reading of about 260 degrees. Stopped just long enough to check temps and then fired another 10 pretty quickly. Now up to 20 rounds pretty quickly and the temp is at 370 degrees. Pretty hot but still not even close to the limit. This is as far as I went with the AR since I had 20 round mag and had some others with me that were wanting to sight in guns. Let the suppressor cool back to ambient while others were shooting then gave it another go on my Ruger Precision Rifle in 6.5 CM. Shot a 10 shot group fairly quickly. Not as fast as possible but still relatively quick. Slid the mirage cover back and got a 265 degrees reading. I really had no idea how hot it was really getting. Nice to know that I am plenty safe. Anyone else checked their suppressor temps?