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10/20/2017 1:01:18 AM
9/22/2017 12:11:25 AM
Posted: 8/21/2005 8:14:43 AM EDT
Who here has actually hurt a barrel by leaving in the ammonia based bore cleaner? I've heard a lot of internet rumor but don't know of anyone who has actually hurt their rifle by leaving it in there. I've used it on chrome lined bores and have never hurt anything.

I'm thinking it's a rumor but could be wrong.

Link Posted: 8/21/2005 8:20:37 AM EDT
Used it for years and never had a problem and even inspected with a bore scope, not one problem but then I know not to leave cleaning agents in my barrel long.
Link Posted: 8/22/2005 6:13:43 AM EDT
Hmmmm....no response. I'm thinking it's a internet rumor.

Link Posted: 8/22/2005 6:38:00 AM EDT
Are you talking about Sweets, Hoppes, or what?

I have left Hoppes #9 in my bore over night, it says you can, it also says you can leave it long term. I have used straight cleaning ammonia in a M48 too. I plugged the barrel and used an eye dropper to drip it down the barrel to clean it. I left it over night and when I went back to it the next day it was an unrecognizable pile of goo on the floor J/K no seriously it was fine and it remove a ton of junk from the barrel and it looked better than ever. I do know that some of the strong copper cutters say not to leave it in the barrel long term; I think you would be best served to listen to them.

Why would you want to leave it in there long term assuming longer than over night?
Link Posted: 8/22/2005 7:28:08 AM EDT
It is posted around here not to leave ammonia based solvents in your barrel longer than 20 minutes or so. But I have never met anyone who has actually hurt a barrel by leaving it in longer than that nor has anyone around here hurt a barrel....at least so far.

My guess is that it's a rumor with no basis in fact.

Still waiting on actual bad experiences!!!
Link Posted: 8/24/2005 6:13:22 AM EDT
Still waiting!!!!!!!!!!!!!!!!
Link Posted: 8/24/2005 9:58:47 AM EDT
Doesn't ammonia hurt aluminum also? Wouldn't that hurt the reciever etc?

Maybe no one ever dared to leave it in to find out. I do know I work in a lab and we have pans (metal?) and cleaners do eat their way through them over time.
Link Posted: 8/24/2005 10:40:20 AM EDT
[Last Edit: 8/24/2005 10:41:22 AM EDT by NoHarmNoFAL-01]
Ammonia + Aluminum =

Simple Green + Receiver =

Ammonia + Steel =

Link Posted: 8/24/2005 12:41:12 PM EDT
Ammonia will remove plating. This is just chemistry. Resistance varies between metals, plating depth, etc.

Hoppes #9 is extremely mild and I have never been able to see that it does anything to chrome plated AR/M16 barrels.........even over 72 hrs or more exposure. OTOH, #9 will do a job on nickel plating, given enough exposure time. Been there.

The more aggressive copper removers (ie., those with higher ammonia content) invariably come with instructions to limit the duration of exposure. I would be inclined to listen to the manufacturer.

If your bore is unplated you have just as much reason to adhere to those recommendations, as ammonia will promote rust.

Link Posted: 8/24/2005 4:02:58 PM EDT
[Last Edit: 8/24/2005 4:03:57 PM EDT by Gregory_K]
Link Posted: 8/25/2005 8:46:25 AM EDT
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