flash hole deburring

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sambubba1

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My Sinclair deburring tool is too large to deburr Lapua cases with small primer pockets, or I am not pushing it hard enough. What do you use?
 
I use the Sinclair tool in my 6BR brass I use to form Dasher rounds and have not had any proublems. It is the one that cleans them up from the out side of the case, I also use the one that cleans my 6.5X284 brass but it cleans from the inside of the case with out any proublems. Harold if you check close almost all have bur's ect in them. I would not have thought it but after cleaning some I know now to check them all.
Terry Pohl
 
I think Lapua has stated that the flash holes are the product of a two step punch proccess. Not drilled.

Regardless, they do vary a tad. I just bought 500 new 220 Russian Cases, and my 1/16 prepping drill will just about go through some woth no resistance, others, it seems to cut quite a bit.

I take them out to 1/16, then deburr the inside.........jackie
 
sambubba1 said:
My Sinclair deburring tool is too large to deburr Lapua cases with small primer pockets, or I am not pushing it hard enough. What do you use?
Click to expand...

Sounds Like you are using the .0625" flash hole tool but what you need is the .081" tool, See PN 07-3000 vs 07-3081

dick
 
sambubba1 said:
My Sinclair deburring tool is too large to deburr Lapua cases with small primer pockets, or I am not pushing it hard enough. What do you use?
Click to expand...

If you're Deburring it's not too large. If you can insert your tool through the neck you can deburr.

Let's define deburring and reaming. The terminology is not synonymous, although it's often used that way and muddies the water.

Deburring refers to removing a tiny portion of brass protruding into the interior of the case, at the mouth of the flash hole. A few revolutions of a deburring tool will accomplish the task. I believe Tony Boyer makes only one revolution if I recall correctly. As long as the tool has a slight angle to the tip, similar to the tip of a drill bit, you can deburr.

Reaming refers to enlarging the diameter of the flash hole. A tool not unlike a drill bit or a properly sized drill bit will do the job. Sinclair International has the tools for the job if you want one, two, or three of the sizes they offer.

Usually, if reaming is performed, inside deburring of the flash hole follows.

Are you Deburring or are you Reaming ? Or, are you performing both steps ?

Here's what the Reamer looks like: http://www.sinclairintl.com/.aspx/pid=36020/Product/Sinclair_Flashhole_Reamer____0625

Here's what the Deburring tool looks like: http://www.sinclairintl.com/.aspx/pid=34127/Product/Gen_II_Universal_FlashHole_Deburring_Tool and http://www.sinclairintl.com/.aspx/pid=35391/Product/17_20_Caliber_Piloted_Flashhole_Deburring_Tool
 
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According to HOF member Jack Neary, the reaming/deburring of the .220 Russian case from Lapua is counter-productive. Using Tony Boyer's rail, reamed versus unreamed cases were tested in a tunnel in PA, and those without reaming performed better than those with the flash hole reamed. Good shooting...James
 
I am using one of the Sinclair deburring tools. I didn't realize there were two sizes. It was strange to me that my tool worked on all the small primer pockets of all brass except Lapua. Thanks for all the replies everyone.

Craig
 
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Sambubba1, the size you're looking for is often referred to as "the .062 flash hole" size. 1/16 inch equals .0625 which is close. Many other small primer cases like the URBR for instance have the huge ".081" hole.

It's been years since I worried about flashholes on Lapua brass.

al
 
JD Mock said:
According to HOF member Jack Neary, the reaming/deburring of the .220 Russian case from Lapua is counter-productive. Using Tony Boyer's rail, reamed versus unreamed cases were tested in a tunnel in PA, and those without reaming performed better than those with the flash hole reamed. Good shooting...James
Click to expand...

I've tried Jack Neary's method only to find out that the depriming tool has a hard time going through the tiny hole, the first time whereas when reamed at .062, no problem. So my question is: doesn't the depriming tool have almost the same effect as a reamer the first time you use it?
 
If there are others reading this thread wondering what to buy to clean up primer pockets and flash holes--Russ Haydon sells his tools specifically by the type of primer pocket and flash hole size----I have not looked at any other sites for these tools, but Russ still designates which are for the Lapua pockets and flash holes.
 
P. Octo said:
I've tried Jack Neary's method only to find out that the depriming tool has a hard time going through the tiny hole, the first time whereas when reamed at .062, no problem. So my question is: doesn't the depriming tool have almost the same effect as a reamer the first time you use it?
Click to expand...

The answer to your question is no. The decapping rod [depriming tool] and reamer perform two different tasks. The reamer looks like a drill bit with spiraled cutting edges, the decapping rod is smooth.

If you're having trouble getting your decapping rod through the flash hole purchase the one with the smaller diameter designed for the 6PPC/220 Russian .059 flash hole. Sinclair International carries them depending on your die. If you purchase a 6PPC F/L die from Harrell's it will come with the smaller diameter rod.

No need to open up the flash hole with a properly sized rod.
 
Abintx,
Thanks for your answer. I have been using Neil Jones decapping tool but I'll have a look at the Sinclair .059.
Best regards.
 
Well, regardless of what it is SUPPOSED to be, I have 500 new 220 Russian cases, (plastic blue box), and just this minute, I opened a fresh box of 100 to see what lurks.

My .0625 drill mounted in a pin vice will go into many of them with no resistance, but others it cuts quite a bit out, just like when they were 1.5mm, or what ever.

I could care less what the official specs say they are, or how they are manufactured. All I know is that they are all not the same exact size......jackie
 
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