What about using computer spray duster as a barrel coolant

[Varmint Hunter]

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[J E Custom]

I use the USB portable power supply for mine and it is handy.
I like the mattress pump Idea and may go that way when mine goes bad.
We stand our rifles up at the range on/in a rack for cooling and safety and the little Chamber Cooler works fine and although it doesn't move as much air, seams to work fine so far. (And no batteries) . You can even use your phone for power in a pinch.

J E CUSTOM

 

[bob4]

I have a Milwaukee battery operated fan ( yeah kinda costly) for those somewhat warm days here in SW Florida. I stand the rifle up for the stove pipe effect and run the fan into the chamber and up the barrel. It works well. Probably cuts shooting time in 1/2. When I have electricity available I plug in an 18 inch fan and just let it blow over the barrel. Works even better. Always one shot and let it cool a few minutes.
I have to wonder how some of these little gadgets work? How much air can a tiny lithium battery move? No doubt better than nothing Im sure.

 

[jasonco]

@Dosh Took your idea and it works great! I changed out the flex tube, because it sounds a bull elk bugling during puberty, to a clear 5/8OD tube! Fits in bolt action and AR.

 

[Dosh]

Great. Two things, with the flex tube the bugleing sound adds a higher curiosity factor at the range and if you gouge up the tube and fitting for grip, you can epoxy it well enough to stay together.

 

[jasonco]

Keep it on the DL, as much as possible. Sounded like an Carrier flight deck

Run your bolt not your jet engine...HA

 

[Varmint Hunter]

I use one of these with a piece of surgical hose, Works great. No bore guide is needed and you don't remove the bolt,

https://www.amazon.com/dp/FLEXTAILGE/?tag=lrhmag19-20

 

[oldfortyfiveauto]

I have a Milwaukee battery operated fan ( yeah kinda costly) for those somewhat warm days here in SW Florida. I stand the rifle up for the stove pipe effect and run the fan into the chamber and up the barrel. It works well. Probably cuts shooting time in 1/2. When I have electricity available I plug in an 18 inch fan and just let it blow over the barrel. Works even better. Always one shot and let it cool a few minutes.
I have to wonder how some of these little gadgets work? How much air can a tiny lithium battery move? No doubt better than nothing Im sure.

I've been doing the same thing with my Ridgid battery fan. Works well.

 

[FEENIX]

I never get my rifle barrels hot. I also tailor my range time when it is cooler. The best I found to let the barrel cool down is to bring more rifles to shoot during wait times. The .22 LRs are best.

 

[DartonJager]

I use either a battery powered minnow bucket aerator or a air mattress inflater powered by your vehicles power outlet both work very and both are well under $20