Flash hole deburring tool
- Thread starter timvv50
- Start date
jonbearman
I live in new york state,how unfortunate !
The K&M is the best uniformer made of all tools made. It wont let you hog out to much material .
I have used a lot of tools for this over the years starting with a drill bit and am currently using the Sinclair Generation 2 and it works well and I do not see a need for anything "better". I will add that I was taught to do this about 100 years ago when I first started reloading and have faithfully done it every since because it looks right. If you are familiar with the characteristics of a sharp edge orifice in mechanical engineering and fluid flow you will recognize the similarity. But I have never seen anyone present any data that shows that it really helps on the target. So it is one more of those things that we do out of faith that we have not evidence that it is beneficial but we do it anyway out of faith and because it is easy to do.
mr45man said:
The tip on that one tends to clog up, and is a pain. It slows down the process. Look for an open-tipped one. Here's a good example: http://www.midwayusa.com/product/729748/lyman-flash-hole-uniformer-tool And another: http://www.midwayusa.com/product/356172/rcbs-flash-hole-deburring-tool-30-caliber Remember, you're deburring so you don't need much force.
CaptainMal
Silver $$ Contributor
Size is an important issue. Lyman and RCBS do not market anything that will work on the typical small flash hole found in BR/PPC cases. You need to get the K&N or Sinclair for them.
I've been using the Sinclair tool (non piloted type) forever. As far as I can tell it is very uniform in depth on similar shaped cases, but this varies from brand to brand. It uniforms the flash hole to a consistent size as well.
Either this one, or the piloted type from Sinclair will do the job, so just pick one.
Cheers.
8)
Either this one, or the piloted type from Sinclair will do the job, so just pick one.
Cheers.
8)
MagnumManiac said:
Uniforming and Deburring are two different steps. One opens up the flash hole the other only removes burrs from the interior leading edge.
Dual purpose tools are great. However, some holes are best left untouched in diameter. Hence, the need for a single purpose tool only.
CaptainMal said:
Not true when it comes to a DEBURRING tool.
If the diameter of the deburring tool's rod will fit through the case neck opening you can deburr the interior edge of the flash hole.
I've done it thousands of times when deburring my 6PPC and 30BR brass and neither Deburring tool is a K&M or a Sinclair.
Deburring the Interior of the Flash Hole and Flash Hole Reaming are two different or distinct operations.
One tool removes rough edges and is inserted through the case neck, the other tool [unless it's dual purpose], only opens up or increases the diameter and is inserted through the base of the case.
I do have a Sinclair Flash Hole Reamer that Reams the typical 6PPC flash hole from .059" to .0625"/.063" but have long ago ceased doing that based on research and testing done by NBRSA Hall of Fame inductee Jack Neary.
Re: Lyman Flash Hole Uniformer
An excellent picture.
But I like this one a little better because it comes from Lyman and shows the insertion route: http://www.lymanproducts.com/lyman/case-prep/flash-hole-uniformer.php
I believe they should change their name to Deburrer vice Uniformer so that it more precisely describes what it actually does.
Semantics or the use of words can really be confusing sometimes.
243winxb said:
An excellent picture.
But I like this one a little better because it comes from Lyman and shows the insertion route: http://www.lymanproducts.com/lyman/case-prep/flash-hole-uniformer.php
I believe they should change their name to Deburrer vice Uniformer so that it more precisely describes what it actually does.
Semantics or the use of words can really be confusing sometimes.
Outdoorsman said:CaptainMal said:
Not true when it comes to a DEBURRING tool.
If the diameter of the deburring tool's rod will fit through the case neck opening you can deburr the interior edge of the flash hole.
I've done it thousands of times when deburring my 6PPC and 30BR brass and neither Deburring tool is a K&M or a Sinclair.
Deburring the Interior of the Flash Hole and Flash Hole Reaming are two different or distinct operations.
One tool removes rough edges and is inserted through the case neck, the other tool [unless it's dual purpose], only opens up or increases the diameter and is inserted through the base of the case.
I do have a Sinclair Flash Hole Reamer that Reams the typical 6PPC flash hole from .059" to .0625"/.063" but have long ago ceased doing that based on research and testing done by NBRSA Hall of Fame inductee Jack Neary.
What Jack did or does doesn't work with the Blue box brass. flash hole vary from less than .059 to the .064 so i use a .0625 reamer to get them closer and you don't chamfer the inside just break it, if anything at all i have not found any burr on Lapua brass that looked anything like the picture. …….. jim
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