FLASH HOLE CUTTER

[dtucker]

How many of you guys use these? Was looking through Sinclair catalog and saw those and thought since i do everything else why not. I know that it says that you do not need to deburr if you use this tool but i was thinking of still doing it after cutting the flash holes. I do not see how doing it this way would result in a negative action do you think? I also was wondering that would'nt it be neat that you could have a tool that deburrs the flash hole and cuts the flash hole in 1 step. The tool i use K&M indexes off the bottom and if the end of the cutter was the size you needed and long enough would'nt you think you could do both steps at one time?

 

[necchi]

I do two things just once to brass,
* De-burr the inside primer hole (inside)
* Uniform the pocket (from the outside)

I've never heard of a pocket cutter. Nor do I have a clue how to do both an inside and outside primer pocket/primer hole modification at the same time.
You got two different things goin on there Pal,

As far as inside hole deburring, 85% of Rem/Win/Fed brass are just fine, but it's that 15% where you can feel a burr comming off that makes it worthwhile in my view.

Some do nothing and the debate will never end,

 

[TheBlueEyedBear]

So, which tool are you referring to:

 

[dtucker]

I am refering to the flash hole reamer. Just wondering if many people use them. As for the second picture down, the flash hole deburr tool, i was picturing in my mind that if the end of the cutter was long enough and the size you need you could deburr your flash hole inside the case as we do and also ream ( or as i say cut ) the flash hole at the same time. Am i making any since about what i am trying to say?

 

[TheBlueEyedBear]

Dan,
As necci quoted, these are definately separate operations. The deburring action should only have to be done one time on the new brass. The flash hole reamer I don't even use anymore on Lapua brass. And, the primer pocker reamer,,, I use it during every load cycle. I found it to be a great way to ensure perfect cleaning of the primer pocket.
These steps are what I practice. Of course there are many other users who probably use different variotions of these steps.
Barry

 

[Cheechako]

Dan

The tool does just that - it deburrs the hole with an angled cutter and reams the flashole diameter at the same time. It also does a third thing. It uniforms the length of the flashhole which most feel is the more important of the 3 things the tool does.

Ray

 

[artbosco]

I am refering to the flash hole reamer. Just wondering if many people use them. As for the second picture down, the flash hole deburr tool, i was picturing in my mind that if the end of the cutter was long enough and the size you need you could deburr your flash hole inside the case as we do and also ream ( or as i say cut ) the flash hole at the same time. Am i making any sense about what i am trying to say?

I use all three on my 30BR cases and now use two of the tools on my 6PPC cases, skipping the flash hole reaming.

Yes, you're making sense.

However, the reaming of the flash hole indexes off of a uniformed primer pocket, from the outside [that's why the front of that tool has the shape it does], whereas, the deburring takes place from the inside only.

Uniforming and Reaming from the Outside, Deburring from the Inside.

Regardless of brass brand, it's a good idea to do all three, unless following Jack Neary's advice on refraining from reaming the 220 Russian for the 6PPC.

 

[necchi]

Am i making any since about what i am trying to say?

Kinda, I think there's just a little confusion in terms.
On the outside of the case is the Primer Pocket or sometimes called the Primer Cup, then inside the Primer Pocket is the Flash hole. (2 different things when talking cases)

The Primer Pocket Uniforming tool, makes the Primer pocket a uniform depth and squares the bottom of the cup so the primer can/will seat flat against the bottom of the pocket/cup.

The Flash Hole Deburring tool, of course works the inside of the flash hole to remove any extra brass left because the Flash Hole is "punched" out during manufacture, years back they drilled the flash hole and the hole was cleaner, but the drill bits would wear and the hole could get smaller, thus "Flash Hole Reaming" was done to make the holes all the same size.

It's all about keeping things the same from case to case so the same amount of "flash" or primer blast is reaching the powder charge with every case.

FWIW, the most common mistake with the prep work is forcing the flash hole deburring tool in too deep, removing too much from inside the hole. A feller can cut so deep the flash hole burns through after just a few firings,,then pressure and primer issue become previlant.