Arisaka Cleaning Brush What Size?

doofus47 · January 5, 2012, 12:00 AM

I"m ogling a beat up Arisaka Type 99 in the LGS. The bore looks a little dark, but it is cheap enough to pick up for a project.

When I had a type 38, cleaning was easy--6.5mm was the correct answer.

For cleaning a Type 99 in 7.7, would you use a .30 caliber brush or a 8mm brush?

Any help appreciated.

the rifleer · January 5, 2012, 12:30 AM

well 30.06 is 7.62 mm, and 8mm is obviously 8mm, so I'd probably try the .30 cal brush first and if it isn't tight then use the 8mm one.

Jim Watson · January 5, 2012, 12:40 AM

If the bore is "a little dark" I would use the 8mm brush to scrub out all the rust and corruption I could. But I would not expect them to last long.

gyvel · January 5, 2012, 02:16 AM

Just remember: As the 8mm brush wears down, you can use it as a .30, then a 7mm, a 6.5 and eventually a 6mm.

BTW, some Type 99s had chrome bores. You might get a pleasant surprise if you just run a patch with solvent down the bore first.

**Mike Irwin** · January 5, 2012, 07:37 AM

Use the same brush you would use for the .303 British or .32 Winchester Special.

madcratebuilder · January 5, 2012, 07:46 AM

7.7mm equals .303 brit.

doofus47 · January 5, 2012, 05:54 PM

gyvel

Quote:

As the 8mm brush wears down, you can use it as a .30, then a 7mm, a 6.5 and eventually a 6mm.

Sweet! Now I have a built in excuse to buy more rifles!

Thanks for the input, guys.

Gunplummer · January 5, 2012, 09:03 PM

If you have rust and gunk in the bore it might be a late war and not worth messing with. There is no real cut off date for chrome lined bores, but I think after 43 they started using a lower grade of barrel steel in most of them. If it is a chrome lined bore it should just be green until cleaned.

jsmaye · January 6, 2012, 10:47 AM

Think about it - the difference between the caliber of the rifle (7.7 mm) and a .30 cal brush (7.62 mm) is only .08 mm - probably far less than the manufacturing tolerance of the brush. You'll be fine with a .30 cal brush.

January 5, 2012, 12:00 AM	#1
doofus47 Senior Member Join Date: June 9, 2010 Location: live in a in a house when i'm not in a tent Posts: 2,483	Arisaka Cleaning Brush What Size? I"m ogling a beat up Arisaka Type 99 in the LGS. The bore looks a little dark, but it is cheap enough to pick up for a project. When I had a type 38, cleaning was easy--6.5mm was the correct answer. For cleaning a Type 99 in 7.7, would you use a .30 caliber brush or a 8mm brush? Any help appreciated.

January 5, 2012, 12:30 AM	#2
the rifleer Senior Member Join Date: March 5, 2008 Location: Sunny California Posts: 1,281	well 30.06 is 7.62 mm, and 8mm is obviously 8mm, so I'd probably try the .30 cal brush first and if it isn't tight then use the 8mm one. __________________ There is no such thing as a stupid question, only stupid people.

January 5, 2012, 07:37 AM	#5
Mike Irwin Staff Join Date: April 13, 2000 Location: Northern Virginia Posts: 41,388	Use the same brush you would use for the .303 British or .32 Winchester Special. __________________ "The gift which I am sending you is called a dog, and is in fact the most precious and valuable possession of mankind" -Theodorus Gaza Baby Jesus cries when the fat redneck doesn't have military-grade firepower.

January 6, 2012, 10:47 AM	#9
jsmaye Senior Member Join Date: July 18, 2008 Location: Amarillo, Tx Posts: 616	Think about it - the difference between the caliber of the rifle (7.7 mm) and a .30 cal brush (7.62 mm) is only .08 mm - probably far less than the manufacturing tolerance of the brush. You'll be fine with a .30 cal brush. __________________ No matter how big and tough you are, when a two-year-old hands you a toy phone you'll answer it.

January 5, 2012, 12:40 AM	#3
Jim Watson Senior Member Join Date: October 25, 2001 Location: Alabama Posts: 18,541	If the bore is "a little dark" I would use the 8mm brush to scrub out all the rust and corruption I could. But I would not expect them to last long.

January 5, 2012, 02:16 AM	#4
gyvel Senior Member Join Date: August 30, 2009 Location: Northern AZ Posts: 7,172	Just remember: As the 8mm brush wears down, you can use it as a .30, then a 7mm, a 6.5 and eventually a 6mm. BTW, some Type 99s had chrome bores. You might get a pleasant surprise if you just run a patch with solvent down the bore first.

January 5, 2012, 07:46 AM	#6
madcratebuilder Senior Member Join Date: November 2, 2007 Location: Northern Orygun Posts: 4,923	7.7mm equals .303 brit.

January 5, 2012, 09:03 PM	#8
Gunplummer Senior Member Join Date: March 11, 2010 Location: South East Pa. Posts: 3,364	If you have rust and gunk in the bore it might be a late war and not worth messing with. There is no real cut off date for chrome lined bores, but I think after 43 they started using a lower grade of barrel steel in most of them. If it is a chrome lined bore it should just be green until cleaned.