After using the Barrel Cool for years and tired of buying those expensive batteries. I decided to make something better. I took a $5 ammo can from Atwoods, a 12v fan out of a doa computer and some tubing I had in the barn. I use this on my 22-250 to my 338. This thing puts out some air. I hook it to a 12v lawnmower battery. Anybody else have something similar or better let my know. This is version 1.0 Any suggestions would be welcome
