Arisaka Cleaning Brush What Size?

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doofus47

New member
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.
 
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.
 
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.
 
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.:D

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

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

Thanks for the input, guys.
 
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.
 
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.
 
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