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ThorroClean Bore Cleaning System

I think it works very well but only use it when it is necessary. If you leave the range with some Hoppe's or something similar in the warm barrel after a few patches to soak, I find that cleaning later or the next day takes little effort.

I also do not use the Bore Flush a 2nd time after the creamy bore cleaner. I patch the cleaner out with dry patches until I get as much out as possible. Then I use a little Montanna Extreme bore conditioner and it removes whatever is left over quite nicely. It only take a little of that stuff.
What does the bore look like afterwards?
 
I use ThorroClean following a couple of soakings with Wipe-out or Patch-out. I think that they help loosen the carbon deposits. Usually two applications of TC seem to get 95% of the carbon and the bore is very clean and shiny.

I discovered what IMO is the best way to apply a paste cleaner, whether its JB, Iosso or TC. I got some very strong long patches from Real Avid Products (link below), and wrap them around a nylon brush. You can control the bore tightness by the number of wraps in an area of the brush. They are cheap and unwind easily after cleaning. Attached is a photo. I tried their Speed Jag, didn’t work, wrapping a nylon brush was a home run.

 

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How many fouling rounds are you guys taking to be back where you like?

I have noticed loss of velocity after using this.
I've kept track of that , and it's usually around twelve to fifteen rounds for the load to come back up to normal velocity , and stay consistent . .308 , six-flute barrel with about 1,500 rounds , and still shooting very tight .
 
How many fouling rounds are you guys taking to be back where you like?

I have noticed loss of velocity after using this.
Once the fouling is out of the barrel, there is less material that forces an increase in pressure, hence velocity. Depending on your individual barrel, load, bullet, etc., a certain amount of rounds will cause your barrel to once again foul and result in an increase of pressure/velocity.

When your barrel starts to wear out and the “boiler room” (throat) increases, the amount of room that controls the pressure is expanded and therefore your velocity decreases. You usually can relate your higher round count to a velocity loss. When I see this I know that the barrel’s time is limited. It may still shoot great, but your velocity will be less.
 
I have a 6cm barrel that took about 10 shots to come back. My 25x7prc I haven't shot since last winter after my deer hunt, cleaned it went and shot a few and they were way low(150fps or so). I plan to get out again soon and get some more rounds down it and see what the deal is.
 

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