Cleaning flash holes - Graybeard Outdoors
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post #1 of 22 (permalink) Old 01-19-2020, 04:40 PM Thread Starter
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Default Cleaning flash holes

I don’t know if it makes a difference, but quite a bit of material is removed.


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post #2 of 22 (permalink) Old 01-19-2020, 08:20 PM
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I uniform the flash holes on my rifle brass, and see similar debris as a result. I don't know if it makes a measurable difference (especially with me behind the trigger) but it's a task that only needs to be performed once, so I go ahead and do it.

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post #3 of 22 (permalink) Old 01-20-2020, 05:05 AM
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I have always done it on new brass and I believe it helps, even if it doesn't it certainly doesn't hurt anything to do it.

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post #4 of 22 (permalink) Old 01-20-2020, 06:46 AM
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I de-prime my cases before cleaning them.
This requires me to check each flash hole afterwards.
I do this with a small eyeglass screwdriver that will fit thru the hole.
In the process, I'll scrape around the hole to remove that stuff.

Ray
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post #5 of 22 (permalink) Old 01-20-2020, 10:40 AM
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I don't know if it makes any difference either, but I do it!

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post #6 of 22 (permalink) Old 01-20-2020, 10:05 PM
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Flashholes ? I'll use a big paperclip pilfered from my wife's stash. I have two or three hanging on magnets on the wall of my shed.....Sometimes I'll even clean the primer pockets.....

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post #7 of 22 (permalink) Old 01-21-2020, 07:56 AM
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I notice most people mention cleaning, and are talking about tools that will do just that. How many are also uniforming the flash holes to ensure they are the same diameter, round, and without burrs or other obstructions from the manufacturing process?

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post #8 of 22 (permalink) Old 01-21-2020, 09:55 AM
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Back when I shot USBR I used only Lapua brass and took every precaution including the primer pockets and flash holes. I even weighed every piece of brass looking for uniformity and Lapua seemed to be the best. I don't shoot USBR anymore as my trigger finger and my brain haven't sorted out when to squeeze the dang trigger in rhythm with the crosshairs jumping at every beat of my heart. For those of you good enough to shoot competitively it's a must.

For my coyote hunting 243 rounds I just make sure the hole from the primer to the powder goes all the way through. I don't even clean that brass. Most of the ejected rounds melt through the snow and are lost before needing cleaned anyway. One can throw all of those particulars out the window when the shooting requires minute of running coyote.
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post #9 of 22 (permalink) Old 01-21-2020, 09:32 PM
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post #10 of 22 (permalink) Old 01-22-2020, 01:08 AM
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I assume you're using one of those RCBS flash-hole uniforming tools. I set mine to cut what looks like a 1/32" bevel on the inside of the case. I believe the bevel allows the flash to funnel-out and ignite the bottom end of the charge, as opposed to having the flash shoot up the middle of the charge and ignite a much larger portion of it all at once. I believe the funneled flash helps to lower the chamber pressure but I'm Polish, so what could I know?
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