Chamber Cooler
thingiverse
I built this to speed up cooling the chamber and barrel after bursts of fire, so you can get back on target faster. It's ideal for sighting in or load development. I've put it through its paces in Rem 700, Win 70, Weatherby Vanguard and Ruger 111 rifles, with no issues. It fits snugly into both long and short action rifles. I designed it around the GDSTime 75mmX15mm fan, using the 5V model with a USB plug to enable carrying a rechargeable power pack to the range. You can swap it out for a 12V model and use batteries if you want even more airflow. https://www.amazon.com/gp/product/B07L9M8T8F/ref=ppx_yo_dt_b_asin_title_o01_s00?ie=UTF8&psc=1
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