Way cool brother. No joke. Good repurposing job, Gonna look at hooking up my cooler to my pump. Thanks !Several years ago I had a total joint replacement done to my left shoulder. For several weeks after I had to keep my shoulder iced down. I used a small machine that has a small ice cooler connected to a fan that pumps cold air through an insulated hose to a dispersing plate that distributes the air to the area needing cooling. Immediately I thought, "barrel chiller!" Thanks to my insurance company for paying for it I decided to repurpose it for cooling down my barrels. Although it had a 110AC plug the fan is identical to a computer cooling fan that runs on 5V so I rewired it and connected it to a trail camera 6V battery pack. Then I cut off the end of a plastic funnel and attached it to the end of the hose so it would fit inside the action pointing down the chamber of my rifles. It would be relatively easy to make one by putting a fan inside of a plastic box with a nipple on each end to attach the hoses and drilling a hole through a small cooler to run one hose through.
This thing, once filled with ice, will cool a barrel in a few minutes.
I worked in AZ for a short bit about 20 years ago, so I feel you on the heat. I remember the first time I walked outside at night there after my arrival. I thought it would start to cool down being that is was after 10pm, walked outside and felt like a hair dryer blasting me in the face..... Too hot for sure.Try load development here in AZ with summer temps hitting 100 Early and getting above 110 regularly. You learn to do 3-5 shot groups and then chance rifles.
We have done this for years and it works very well. Shooting Silhouette matches in the summer sometimes there aren't many shooters and there isn't enough time between relays for the barrel to cool down.On really hot days I'll take a small cooler with a rag and ice water and wipe down the exterior of my barrels to keep them cool. It usually only takes a couple minutes to get varmint contour barrels back down to near ambient temp.
Its hot and then some.I worked in AZ for a short bit about 20 years ago, so I feel you on the heat. I remember the first time I walked outside at night there after my arrival. I thought it would start to cool down being that is was after 10pm, walked outside and felt like a hair dryer blasting me in the face..... Too hot for sure.