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The Basics, Starting Out
Cleaning with patches only
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<blockquote data-quote="gunplt" data-source="post: 2774794" data-attributes="member: 121273"><p>My understanding is that it isn't the brush that does the scratching, rather it is the abrasive materials inside the barrel that the brush dislodges and holds as the brush passes down the bore (of course the same could be said for patches). There is only 2 types of cleaning to my knowledge: chemical (solvents) and abrasive. For chemical a combination of polar and nonpolar solvents is typical, and for abrasive most competitive shooters seem to use something similar to JB Bore Paste with Kroil using either patches or felt bore pellets rather than brushes. Also many shooters are not cleaning rifles as frequently as in the past; many waiting until accuracy losses are noted before cleaning. 200 rounds is another common number of rounds I see mentioned as a point when at least minimal cleaning is performed. There is a good thread on snipers hide on the subject of barrel cleaning: <a href="https://www.snipershide.com/shooting/threads/the-evolution-of-barrel-cleaning.6497975/" target="_blank">https://www.snipershide.com/shooting/threads/the-evolution-of-barrel-cleaning.6497975/</a> . There is also a discussion on this topic between Brian Litz & Eric Cortina near the beginning of this video [MEDIA=youtube]Z0RC17Dbtws:3[/MEDIA] . I am not a competitive shooter, and work travel keeps from shooting as much as I would like, but I generally go with occasional cleaning depending on caliber (obviously rimfire requires more frequent cleaning). Predominately I use patches, Boretech products, and JB bore paste. I have yet to try CLR though I have heard good things (though the constituent ingredients in CLR are polar so I would follow it up with a product like Hoppes No 9 or Boretech, or other nonpolar solvents). A quick comment on the nonpolar term: carbon will readily bond with the iron in the barrel and it is a covalent bond (the strongest bond known) and it is my understanding that only nonpolar solvents or abrasion (in the context of barrel cleaning) can break apart covalent bonds. The carbon ring that forms in the throat has been seen as a frequent issue in the newer PRC cartridges and other "overbore cartridges". So this is the reason for my focus on nonpolar solvents as I typically shoot these cartridges, don't clean frequently, and want to minimize the chance of encountering this issue.</p></blockquote><p></p>
[QUOTE="gunplt, post: 2774794, member: 121273"] My understanding is that it isn't the brush that does the scratching, rather it is the abrasive materials inside the barrel that the brush dislodges and holds as the brush passes down the bore (of course the same could be said for patches). There is only 2 types of cleaning to my knowledge: chemical (solvents) and abrasive. For chemical a combination of polar and nonpolar solvents is typical, and for abrasive most competitive shooters seem to use something similar to JB Bore Paste with Kroil using either patches or felt bore pellets rather than brushes. Also many shooters are not cleaning rifles as frequently as in the past; many waiting until accuracy losses are noted before cleaning. 200 rounds is another common number of rounds I see mentioned as a point when at least minimal cleaning is performed. There is a good thread on snipers hide on the subject of barrel cleaning: [URL]https://www.snipershide.com/shooting/threads/the-evolution-of-barrel-cleaning.6497975/[/URL] . There is also a discussion on this topic between Brian Litz & Eric Cortina near the beginning of this video [MEDIA=youtube]Z0RC17Dbtws:3[/MEDIA] . I am not a competitive shooter, and work travel keeps from shooting as much as I would like, but I generally go with occasional cleaning depending on caliber (obviously rimfire requires more frequent cleaning). Predominately I use patches, Boretech products, and JB bore paste. I have yet to try CLR though I have heard good things (though the constituent ingredients in CLR are polar so I would follow it up with a product like Hoppes No 9 or Boretech, or other nonpolar solvents). A quick comment on the nonpolar term: carbon will readily bond with the iron in the barrel and it is a covalent bond (the strongest bond known) and it is my understanding that only nonpolar solvents or abrasion (in the context of barrel cleaning) can break apart covalent bonds. The carbon ring that forms in the throat has been seen as a frequent issue in the newer PRC cartridges and other "overbore cartridges". So this is the reason for my focus on nonpolar solvents as I typically shoot these cartridges, don't clean frequently, and want to minimize the chance of encountering this issue. [/QUOTE]
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