Is deburring flash holes still a thing?
- Thread starter 4xforfun
- Start date
Never done it ... never saw the need ... things go "BANG" just fine. That said, I use quality brass ... Lapua and Peterson.
Brass with jagged flash holes is now more prevalent than ever. My used to be premium brass that exhibited only a few jagged flash holes per hundred now exhibit more than 10% of the cases with jagged flash holes.
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Deburring is a one time operation if needed.
Only to remove a ‘burr’ left after the flash hole is punched or ‘done’ in any manner by the manufacturer. Lapua, some claim,drills their flasholes. Could be , I’ve no idea, don’t care, but I certainly have found burrs in their brass. I’m only removing the burr. (if it exists) .Not enlarging the hole nor changing the angle.
Only to remove a ‘burr’ left after the flash hole is punched or ‘done’ in any manner by the manufacturer. Lapua, some claim,drills their flasholes. Could be , I’ve no idea, don’t care, but I certainly have found burrs in their brass. I’m only removing the burr. (if it exists) .Not enlarging the hole nor changing the angle.
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I still do it as part of the process for preparing new cases. It only needs to be done once.
But quite honestly, I haven't seen any performance results improvement by doing it. Here, again, I am a victim of the internet and "experts" that told me that it was essential for precision reloads.
I wonder if those "experts" have stock in companies that sell reloading tools.
Maybe benchrest guys need to do this but my groundhogs can't tell the difference.
However, I will probably continue to do it because mentally, if I quit, it will creep into my old brain when I miss and I will think, "did a flash hole burr cause that," even though shooting thousands of rounds before I did it and after I starting do it, I could discern no difference on target.
But quite honestly, I haven't seen any performance results improvement by doing it. Here, again, I am a victim of the internet and "experts" that told me that it was essential for precision reloads.
I wonder if those "experts" have stock in companies that sell reloading tools.Maybe benchrest guys need to do this but my groundhogs can't tell the difference.
However, I will probably continue to do it because mentally, if I quit, it will creep into my old brain when I miss and I will think, "did a flash hole burr cause that," even though shooting thousands of rounds before I did it and after I starting do it, I could discern no difference on target.
For those who have studied engineering including fluid flow and gas dynamics, the concept of a sharp edge orifice and its flow characteristics, will have a good understanding of how imperfections in the orifice will affect the flow pattern. The primer pocket flash hole functions similarly to a sharp edge orifice. I have never seen any creditable testing of the effect of imperfections in the primer pocket flash holes on accuracy, but eliminating those imperfections is one of those simple steps in brass preparation that eliminates the concern, so I do it.
Always, only the first time I prep new brass, since it only has to be done once.
I guess....since I already have the tool...........................butchlambert
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Take one of your new pieces of brass and inspect it. Fire it and look again. Is the burr still there?
Good question!
How do you know it made a difference?
If I tried it and said that it did not make a difference, how would you know?
This is not an adversarial reply.
I appreciate your input to a subject that I have an interest in.
Best wishes
Clyde
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