Is this a one time event or how often?
Ben
Ben
Primer pocket deburing
- Thread starter BenPerfected
- Start date
Jason Boersma
Silver $$ Contributor
Uniforming the primer pocket only needs to be done once, I've never had one that cut a second time.
For what it's worth , I use my uniforming reamer to clean pockets every time lol..... And I have also noticed on some cases that I will still take some brass again even after 3rd and 4th firings.
Try it , You may be surprised. Generally it is indeed a one time procedure when done correctly.
Try it , You may be surprised. Generally it is indeed a one time procedure when done correctly.
Are you referring to primer pocket uniforming, or flash hole deburring?BenPerfected said:
Either is a one off operation for me, but I rarely uniform pockets these days, unless they pose a problem. I just debur flash holes in all of my brass, from 222 Rem right through to 505 Gibbs.
Cheers.
8)
MagnumManiac said:
I didn't word that correctly, I was trying to ask about deburing the flash hole.
Thanks for the feedback.Ben
Corey Schwanz
Site $$ Sponsor
Flash hole de-burring is a one-time deal. Primer pocket uniforming can and should be done more often for two reasons. Consistency: you want the primer set to the same distance from the powder each and every shot for consistent ignition. Safety: The primer needs to be seated slightly below flush.
RegionRat
Gold $$ Contributor
I'm with Corey.
Taking a lesson from the rimfire guys, getting consistant ignition is worth the trouble.
Flashhole needs to be either cut to identical for the batch the first time, or inspected for the first time. You would be surprised what you will find in even the best brass.
The pocket diameters are worth inspecting the first time and also after the first firing on a sampe basis with the larger magnums. If they are near the minimum material condition before they are exposed to high pressure, they may be marginal as the head deforms.
The pocket depth should be inspected and uniformed the first time on the whole batch, and at least sampled after that in the case of the magnums. I would say if you make it easy to study, looking at all of these dimensions on a sample basis for any new recipes will only teach you to be a better loader.
Some cartridge designs are more prone to short brass life than others. Some brands of brass have a reputation for poor QC on the web thickness that leads to issues with ignition and primer retention. If you develop your toolbox and keep notes, you will get better faster.
Taking a lesson from the rimfire guys, getting consistant ignition is worth the trouble.
Flashhole needs to be either cut to identical for the batch the first time, or inspected for the first time. You would be surprised what you will find in even the best brass.
The pocket diameters are worth inspecting the first time and also after the first firing on a sampe basis with the larger magnums. If they are near the minimum material condition before they are exposed to high pressure, they may be marginal as the head deforms.
The pocket depth should be inspected and uniformed the first time on the whole batch, and at least sampled after that in the case of the magnums. I would say if you make it easy to study, looking at all of these dimensions on a sample basis for any new recipes will only teach you to be a better loader.
Some cartridge designs are more prone to short brass life than others. Some brands of brass have a reputation for poor QC on the web thickness that leads to issues with ignition and primer retention. If you develop your toolbox and keep notes, you will get better faster.
BenPerfected said:MagnumManiac said:
I didn't word that correctly, I was trying to ask about deburring the flash hole.
Ben
Now that we've got Primer Pocket Uniforming and Primer Pocket Cleaning out of the way ...
Let's define this a little further.
Deburring the Flash Hole?
Or Reaming the Flash Hole? ???
Chappy
Silver $$ Contributor
I do both. First the reaming, then the deburring.Outdoorsman said:BenPerfected said:MagnumManiac said:
I didn't word that correctly, I was trying to ask about deburring the flash hole.
Ben
Now that we've got Primer Pocket Uniforming and Primer Pocket Cleaning out of the way ...
Let's define this a little further.
Deburring the Flash Hole?
Or Reaming the Flash Hole? ???
Chappy,
If you have the Sinclair Flash hole deburring tool you are doing both at the same time. Just go deep enough to leave a little chamfer on the flash hole on the inside of the cartridge case. You can both ream and deburr in separate operations if you wish but this may be redundant. Check and see. If you are using brass with a .060 flash hole like Lapua Palma .308 , 6BR, 6.5X47 ETC. Use the Sinclair reamer only. It will take out any burr inside the case (rarely are any) and ream the flash hole just enough so your decapping pin wont stick but not too much to negate the effect of the small flash hole. If you trim all your cartridges to the same length new out of the box use the piloted flash hole tool. If not get the Gen 2 tool with the cone depth adjustment. Both tools are for .080 flash holes only. This is an operation you only have to do once. Primer pocket uniforming is done from the time you take the brass out of the box till its last reloading. Hope this helps!
Take care,
Phil Hoham
Berger Bullet Tech
If you have the Sinclair Flash hole deburring tool you are doing both at the same time. Just go deep enough to leave a little chamfer on the flash hole on the inside of the cartridge case. You can both ream and deburr in separate operations if you wish but this may be redundant. Check and see. If you are using brass with a .060 flash hole like Lapua Palma .308 , 6BR, 6.5X47 ETC. Use the Sinclair reamer only. It will take out any burr inside the case (rarely are any) and ream the flash hole just enough so your decapping pin wont stick but not too much to negate the effect of the small flash hole. If you trim all your cartridges to the same length new out of the box use the piloted flash hole tool. If not get the Gen 2 tool with the cone depth adjustment. Both tools are for .080 flash holes only. This is an operation you only have to do once. Primer pocket uniforming is done from the time you take the brass out of the box till its last reloading. Hope this helps!
Take care,
Phil Hoham
Berger Bullet Tech
If I'm using Lapua brass I do not touch the flash hole in any way shape or form .. Ream the pockets for depth , yes but negative on messing with the flash hole.
There are tests out there that have proven messing with the flash hole on Lapua cases has not shown improvement and may have in fact done more harm than good.
They do not "punch" their flash holes like most other manufacturers.
There are tests out there that have proven messing with the flash hole on Lapua cases has not shown improvement and may have in fact done more harm than good.
They do not "punch" their flash holes like most other manufacturers.
Patch700,
There have been tests showing this yes. But again, you never know and must test for your rifle. I have a 6BR that doesn't seem to be affected either way when tested and that's shooting it out 300 to a 1000yds. IF you do decide to ream the flash hole though use the Sinclair reamer. It seems to be the tool of choice if reaming with the benchrest crowd. Great cartridge ! Does many things very well.
Take care,
Phil Hoham
Berger Bullet Tech
There have been tests showing this yes. But again, you never know and must test for your rifle. I have a 6BR that doesn't seem to be affected either way when tested and that's shooting it out 300 to a 1000yds. IF you do decide to ream the flash hole though use the Sinclair reamer. It seems to be the tool of choice if reaming with the benchrest crowd. Great cartridge ! Does many things very well.
Take care,
Phil Hoham
Berger Bullet Tech
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