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Chamfer the inside flash hole - Tool?

dpilot83

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Minuteman
Dec 5, 2010
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<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: doc76251</div><div class="ubbcode-body">
3. Chamfer the INSIDE flash hole. Unless you buy Lapua or some other brass which has drilled flash hole most flash holes are pressed into the brass. This can create a burr on the inside of the case. The effect is rather significant in terms of consistency if you leave it there. The drop in my velocity variations simply by removing this was significant. For this step I like the old RCBS Universal or the current Midway EJS Flash Hole Reamer. I specify these because they index on the web of the case as opposed to the mouth. This is important because you don’t have to trim all your brass to an exact length before hand to get the same depth of chamfer.
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I'm trying to get set up for reloading and after reading doc's Reloading 101 I'm tracking the tools down that he uses. This one I cannot find. Looks like it's no longer produced. Any suggestions? Thanks.
 
Re: Chamfer the inside flash hole - Tool?

Yes sinclair.has them instock its a flash hole deburing tool!!
 
Re: Chamfer the inside flash hole - Tool?

I found it. Thank you very much guys. I appreciate it.
 
Re: Chamfer the inside flash hole - Tool?

dp,

K&M makes a nice one. Two sizes, one for small flash holes and one for large. Bruno's or K&M has them.

HTH,
DocB
 
Re: Chamfer the inside flash hole - Tool?

Hornady, Lyman, RCBS, Redding (and others, I'm sure) also offer a debur tool.

I use a K&M.
 
Re: Chamfer the inside flash hole - Tool?

didnt know they had small and large.. im going to have to look into another tool!!
 
Re: Chamfer the inside flash hole - Tool?

The K&M tool is THE way to go!!!!!
 
Re: Chamfer the inside flash hole - Tool?

Should there be any difference in the size of the flash hole between the .223 and the .308 cartridges?

I'm currently using the Sinclair "Universal" deburring tool. Always wondered if it was taking too much on the smaller caliber...

Then again, results downrange have been fine so it never concerned me much.
 
Re: Chamfer the inside flash hole - Tool?

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: former0302</div><div class="ubbcode-body">Should there be any difference in the size of the flash hole between the .223 and the .308 cartridges?

I'm currently using the Sinclair "Universal" deburring tool. Always wondered if it was taking too much on the smaller caliber...

Then again, results downrange have been fine so it never concerned me much.</div></div>

I've got a batch of IMI match .308 brass and that's the only one I've come across with a different sized flash hole. It's a tad smaller than normal .308 and .223 flash holes.
 
Re: Chamfer the inside flash hole - Tool?

I've been using the RCBS flash hole deburrer. You can purchase additional pilots. I bought two. One dedicated to 223 and the other is for larger calibers as this is a one time process and I don't shoot as much 308 / 260 as I do 223.
 
Re: Chamfer the inside flash hole - Tool?

I've got a couple of the Lyman ones. I set the deburr length after I FL size, then trim the cases to specific length. Once it is set don't mess with it and you will be able to create a consistent primer hole chamfer inside each of the cases. I have one for each caliber I load. Also you can unscrew the handle and the shaft will screw into the Lyman or RCBS power prep stations which makes using it even easier. Also you only have to do this to a brass case once in its life.
 
"I specify these because they index on the web of the case as opposed to the mouth. This is important because you don’t have to trim all your brass to an exact length before hand to get the same depth of chamfer."

I don't understand how these tools index on the "Web Of The Case." Looks like they all index on the mouth to me. Am I missing something??

Pete
 
Maybe you are confused by the centering bearing? If you are going by illustrations? All I have seen bottom out against the base. Inside the case. BB
 
An 1/8" drill bit (turned by hand) will do the job very easily.
Since (most) drill bits have 2 flutes, it takes a little over 1/2 turn to deburr a hole.

Joe
 
Maybe you are confused by the centering bearing? If you are going by illustrations? All I have seen bottom out against the base. Inside the case. BB

I guess whats got me confused is how can you go the same depth each time UNLESS, you trim all your cases first and then debur the flash hole?

Pete
 
"UNLESS, you trim all your cases first and then debur the flash hole?"

Either I have not seen the type he's talking about, OR easiest is to just buy one and use it. It has nothing whatever to do with the length of the case. BB
 
The lyman and rcbs, i have both, set depth of chamfer by the oal of case. The pilot acts as a stop. I prefer the gen 2 Sinclair tool, it has a stop built in around the cutter that indexes off the web. I use lee trimmer tools they set oal of brass to minimun. The problem with using the lee trimmer on new brass is that new brass is sometimes shorter then minimum. Not all cases, just some in a bag. The longer ones get trimmed, but the shorter ones do not with the lee. If u use a deburrer tool that indexes off oal the chamfer will be different depths. With the Sinclair tool that is a moot point. In my case i can fire new brass, then all get trimmed a hair with the lee tool and then deburr with a lyman/rcbs flash hole tool, did this for years. Finally bought a Sinclair tool and i can deburr new brass regardless of oal. I tend to deburr all flash holes, even lapua brass. I can see better ES &SD afterwards. The only brass i do not mess with is lapua 6 BR it can actually hurt es/sd.
 
The lyman and rcbs, i have both, set depth of chamfer by the oal of case. The pilot acts as a stop. I prefer the gen 2 Sinclair tool, it has a stop built in around the cutter that indexes off the web. I use lee trimmer tools they set oal of brass to minimun. The problem with using the lee trimmer on new brass is that new brass is sometimes shorter then minimum. Not all cases, just some in a bag. The longer ones get trimmed, but the shorter ones do not with the lee. If u use a deburrer tool that indexes off oal the chamfer will be different depths. With the Sinclair tool that is a moot point. In my case i can fire new brass, then all get trimmed a hair with the lee tool and then deburr with a lyman/rcbs flash hole tool, did this for years. Finally bought a Sinclair tool and i can deburr new brass regardless of oal. I tend to deburr all flash holes, even lapua brass. I can see better ES &SD afterwards. The only brass i do not mess with is lapua 6 BR it can actually hurt es/sd.

Okay! I think we're getting some where. Is this the tool you're describing 6br? :

GEN II UNIVERSAL FLASHHOLE DEBURRING TOOL | Sinclair Intl

If I look at the pic of the tool but then go to the video that describes the tool pictured, that appears to be a different tool being talked about( in the video)-right??

Pete