Is deburring flash holes still a thing?

[tom]

Tod,

I haven't been in several years on lapua br and now adg wsm. I look over my lot when I get a fresh lot though. I've actually stopped uniforming them in more recent years as well. But I'm weird, and actually shoot paper to test things lol.

Tom

 

[STORM2]

It would seem logical that if you are not running radar you will not have a way to see the result.

 

[big john 5394]

I do the flash holes every time, you have to see the carbon and brass that come out.

 

[Websurfer]

Debur? Yes. Always. On any brass that I care about accuracy. Why? I’ve never seen it hurt, and I have the tools, so why not?

 

[Straightshooter1]

I do the flash holes every time, you have to see the carbon and brass that come out.

You mean like this :

 

[searcher]

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.

If they do use drills to make the holes - they use different sized drills....

 

[kyotekiller25]

The tools do not index off the critical spot.

I am pretty sure it is discussed in this video.

Looks like I need to invest in one of those $600 primer seaters...

I watched that whole video, and I honestly had never even thought about it. Now after watching, it all makes sense...

Been hand seating primers with an RCBS hand seater for 25 years. Just put it in the hole, and were good to go hahaha. There's so much more to it than that, and I never gave it any thought.

Now the bigger problem here is how I'm going to tell the wife I need a $600 primer seater. But like he said in the video, it touches all your rifles. And it cuts your groups in half. I was perfectly happy with 1/2 MOA, but I'd be even happier with 1/4 MOA!

Thanks for taking me down this rabbit hole LOL.

 

[Kracken McGraw]

Looks like I need to invest in one of those $600 primer seaters...

I watched that whole video, and I honestly had never even thought about it. Now after watching, it all makes sense...

Been hand seating primers with an RCBS hand seater for 25 years. Just put it in the hole, and were good to go hahaha. There's so much more to it than that, and I never gave it any thought.

Now the bigger problem here is how I'm going to tell the wife I need a $600 primer seater. But like he said in the video, it touches all your rifles. And it cuts your groups in half. I was perfectly happy with 1/2 MOA, but I'd be even happier with 1/4 MOA!

Thanks for taking me down this rabbit hole LOL.

But you do also realize he’s trying to sell you that expensive priming tool.

 

[big john 5394]

I have it i did a primer seating test at 100 yds and the amount of crush makes a difference ,008 crush seams to work with most people, shooting is like racing you eliminate the variables.

 

[MikeRu]

My first step with new brass is to drill the small holes out with a .071 drill, then I'm done with them.

I used 5/64” drill bit 0.078” to enlarge the flash hole on my Lapua 6.5 Creedmoor SRP cases, shoots fine.

 

[barefooter56]

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.

LAPUA " punches" its flash holes like everyone else. Drilling the flash holes would slow production to a crawl. Bryan Litz has done a study that can be found in his book " MODERN ADVANCEMENTS IN LONG RANGE SHOOTING" Part 2 Chapter 5. DOing flash hole deburring can improve the ignition process and help reduce STANDARD DEVIATION (SD)

 

[Longtrain]

A while back when I was shooting F-T/R, a fellow shooter that did not reload, offered me 1000 308 once fired Hornady Match cases. They all needed deburring, I don’t know at the time who made their cases, but they were very similar in weight and neck thickness to Winchester. Since, I shoot only Lapua and very few need a touch up.

 

[Benchrest Braxton]

Looks like I need to invest in one of those $600 primer seaters...

I watched that whole video, and I honestly had never even thought about it. Now after watching, it all makes sense...

Been hand seating primers with an RCBS hand seater for 25 years. Just put it in the hole, and were good to go hahaha. There's so much more to it than that, and I never gave it any thought.

Now the bigger problem here is how I'm going to tell the wife I need a $600 primer seater. But like he said in the video, it touches all your rifles. And it cuts your groups in half. I was perfectly happy with 1/2 MOA, but I'd be even happier with 1/4 MOA!

Thanks for taking me down this rabbit hole LOL.

you can do the same thing for 1/3rd of the price with the ugly reloading PCPS

tested it side by side to my primal rights and is every bit as precise

 

[Rat Rifle]

It increases primer seating depth variation.

Not the one I use. RCBS “FIXED HEIGHT”

 

[Chilly807]

Interesting about the 223 benefiting from the de-burr step according to Litz. I've had issues with high SD and ES. Like many others, I drank the Lapua Kool-Aid and didn't bother checking flash hole size or de-burring them.

I should have known better given the 223's sensitivity to little inconsistencies.

I guess I know what I'm doing this afternoon. Can't hurt anything, at the very least.

 

[Mulligan]

LAPUA " punches" its flash holes like everyone else. Drilling the flash holes would slow production to a crawl. Bryan Litz has done a study that can be found in his book " MODERN ADVANCEMENTS IN LONG RANGE SHOOTING" Part 2 Chapter 5. DOing flash hole deburring can improve the ignition process and help reduce STANDARD DEVIATION (SD)

Phil,
Your presence on this forum adds real value.
Thank you

CW

 

[AlNyhus]

After our Easter celebrations today, I decided to prep brass for a hunting rifle project I'm doing. Being a firm believer in high quality brass and doing the prep work, even for hunting rifles, I purchased 100 pcs. of a well regarded mfg. whose brass I've used extensively for many years. You could see the flash hole shapes were all over the place. The brass shavings here are from deburring those 100 30-06 cases.

Good shootin' -Al

 

[TylerFromMS]

you can do the same thing for 1/3rd of the price with the ugly reloading PCPS

tested it side by side to my primal rights and is every bit as precise

I’ve got one in the other day. Really impressed and it addresses some of the CPS shortcomings- spring/rubber band being a necessity, primer tube wobble, shuttle wobble- those things don’t really affect how well the CPS works, but it still felt kind of janky while still feeling well made. I can’t describe it. For $200, this thing is worth a shot.

I also found out that you can put a primer below case head by 0.040” and bend the rim while you’re seating it and it won’t detonate. Did that while I was trying to get the end of press handle to be the hard stop.

 

[RedfootRanch]

After our Easter celebrations today, I decided to prep brass for a hunting rifle project I'm doing. Being a firm believer in high quality brass and doing the prep work, even for hunting rifles, I purchased 100 pcs. of a well regarded mfg. whose brass I've used extensively for many years. You could see the flash hole shapes were all over the place. The brass shavings here are from deburring those 100 30-06 cases.

Good shootin' -Al

I've seen much like this from some top notch brass. I recently check 50 Peterson for a new build and got zero.

 

[Kracken McGraw]

After our Easter celebrations today, I decided to prep brass for a hunting rifle project I'm doing. Being a firm believer in high quality brass and doing the prep work, even for hunting rifles, I purchased 100 pcs. of a well regarded mfg. whose brass I've used extensively for many years. You could see the flash hole shapes were all over the place. The brass shavings here are from deburring those 100 30-06 cases.

Good shootin' -Al

I bet some of those felt like you hooked something hard on the first twist.