Inner primer hole burr .45acp

[Craig from kazoo]

I'm reloading some .45 acp brass a fired a while back. As I was poking out bits of corn cob polishing media from the inside of my primer holes with a wooden skewer, I could feel and see a burr on the inside primer hole.

My question is, is this a non-issue? I deburr my rifle i.d. primer holes but not sure you need to on the .45. At the same time though, these rounds will be the results of a new load on a new press, so I'm not keen on more variables lol.

Thanks,

Craig

[Hefights]

What are you loading for? I can't imagine it would make any notable difference in pistol shooting. Deburring primer pockets in .45 ACP is a strong candidate for a waste of time.

[Craig from kazoo]

And that's what i'm trying to avoid, thanks.

[joem]

Deburr a few and try them out to see if you notice any difference.

[mikld]

I'm of the thought that any process done on one's brass is only a waste of time/effort if the user thinks so. I don't do a lot of things to my brass that some do, but I may do some things no one else does. For my M1 brass (HXP) I do a lot of stuff I don't do on any other caliber I reload. But I have the time, I don't mind, and I'm doing some "reloading stuff". I only tumble my 45 ACP brass 'cause I like a shiny case to be able to find them in the dirt, rocks and misc. stuff at the range, nuttin' more, no trimming, no primer pocket cleaning, etc., but I'd suggest a test, if you wanna; deburr and trim, re-do all primer pockets, tumble to a high polish, and sort by head stamp and weight. Reload and check groups. Then take some mixed brass, right off the range and reload them, same load. See if there is a difference to you...

[Timberwolf]

If Bullseye shooting, maybe deburr them, else load 'em up and shoot.

[Craig from kazoo]

I'll see how they shoot without. They have shot successfully before, guess I just don't remember the burrs being so obvious.

Sure won't miss the work!

Thanks,

Craig

[Sunray]

The only time it'd matter is if it interfered with seating the primer.

[Matt Anthony]

The only time it'd matter is if it interfered with seating the primer.

In my opinion and with what I have been taught, the inner surface of the primer flash hole should be clear of any burrs or pieces of brass from when the machine punched the primer hole. Will it hurt anything, probably not, but it's not suppose to be there!
Matt

[raymeketa]

Deburring flash holes on anything but super accurate Benchrest ammunition is a waste of time. Even then, you'd be hard pressed to tell any differences. Deburring something like 45 ACP will not turn your M1911 pistol into a match winner. Besides, how exactly would you be able to tell the difference in accuracy? You would need something like a Ransom Rest and even then you'd be measuring differences so small that they'd be meaningless.

JMHO

[Craig from kazoo]

I'm not expecting match accuracy, but if I could get rid of an occasional flier then hooray. I'm finishing up prepping 500 cases so after taking your appreciated advice, I'm saving a bunch of time.

Thanks,

Craig

[Matt Anthony]

I'm not expecting match accuracy, but if I could get rid of an occasional flier then hooray. I'm finishing up prepping 500 cases so after taking your appreciated advice, I'm saving a bunch of time.

Thanks,

Craig

It is true that benchrest shooters take much time to insure their cases all are equal. By doing that they take another variable out of the accuracy question. Flash hole deburring does matter as far as flame distribution, don't let anyone tell you any different.
Buying cases such as Lapua, will allow you to see why they cost what they do! Very little prep is needed with these cases.
As these pistol cases of yours, deburring is an option by you, however, it would drive me crazy to know they could have burrs due to the manufacturing process and not removed! I couldn't sleep at night knowing this..............
Matt

[raymeketa]

It's true that Benchrest shooters (I am one) do many things to their brass that other shooters would not think of doing. But, we will also admit that some of the things probably do nothing to improve accuracy. De-burring flasholes is one of those things. AFAIK, no one has ever done any controlled testing to see if ragged flasholes make any difference. But, we will keep doing it just in case it does make a difference. Benchrest matches are won or lost in thousandths of an inch differences in group size so it's worth the extra time. Plus, it only has to be done once.

Most Benchrest shooters feel that the length of the flashole is more important than it's diameter or uniformaty. So, we use tools that uniform flashole length, with diameter and removing the ragged edge as secondary.

Deburring flash holes on cartridges such as 45 ACP is probably a waste of time. IF there is any improvent in accuracy because of it, you'd never know because there is no way to measure such small differences in a pistol.

But, if it makes you feel better, then do it.

Ray

[Hefights]

If you're shooting mixed or range brass, you will have many more variables there. Not something you do for normal pistol shooting, maybe somebody does it but I have yet to meet them. The time to worry, maybe, is if you see AMERC on the headstamp. The flash holes are way off center and it's lower quality, and I have heard some other horror stories too. I have a can AMERC brass, and even with the off center holes they actually still shoot ok.

[Matt Anthony]

Most Benchrest shooters feel that the length of the flashole is more important than it's diameter or uniformaty. So, we use tools that uniform flashole length, with diameter and removing the ragged edge as secondary.
Ray

I have been shooting benchrest for 30 years and I have never heard that the length of the flash hole is an issue. Deburring and making sure the flashhole is concentrict (actually round) is an operation and uniforming the primer pocket so it's flat is yet another. There are specs on primer pocket depth. Never have I seen flash hole depth/length dimensions nor have I ever seen tools to change the depth of the flash hole from inside the case. Enlighten me please! This is one of the reasons I use Lapua cases on my three bench rest rifles!
As an example on Lapua cases, I have an old Rem. 40X in 222 Rem. with a blueprinted action, jewell trigger, Krieger SS barrel blank in a Holland stock topped with a Leupold 36X scope with Kelby rings. With N133 and 52 gr. 1410 Sierra's you measure the 5 shot hole at 100 yards. I know the PPC's have taken over and the 222 is but a past dream, but with every duck in order, it still surprizes me how accurate this cartridge is! I say brass quality matters and I stick with the opinion on flash hole concentricy. On other brands of brass, I have noted large pieces of brass clinging to the inner hole surface. With pistol brass, since I only load a small quantity at a time, I still deburr the brass, it's just another operation to me!
Matt