Flash hole deburing

[pdq_wizzard]

anyone do it for there loads? if so have you noticed that R-P brass seems to be about the worst? it is hard to get the tool in there.

[halifax]

I have a deburring tool setup in my RCBS prep station. All my new rifle brass gets the treatment. Just because I can, I guess.

[xrMike]

I've never bothered with it personally. Only because I think that for 99% of shooters, me included, deburring flash holes is kind of like the same as neck turning -- very few are good enough shooters to where that that would matter.

[joelogic]

Now I may think it's overkill but its not quite the same as neck turning. Deburring is for a consistent burn which is better for a consistent velocity. Neck turning is for an even pressure squeezing the bullet. But you are right I would believe most people will never be as accurate as needing to chase neck turning or meplat shaving or jacket thickness testing for that matter.

[NRAhighpowershooter]

I only de-burr flashholes on my 600yd+ loads

[killshot44]

I did it to ~3,000 cases of LC. Sadly. And swaged 'em all with the Dillon SS.
I figure what the hell, you only have to do it once.

[Stryfe76]

I have a deburring tool setup in my RCBS prep station. All my new rifle brass gets the treatment. Just because I can, I guess.

I have an old hand crank drill in a vise with a Lee case trimmer shell holder and I do all my brass right after I trim it because the jagged flash holes bug me and it's already in the shell holder. I doubt it makes any real difference esp with the pistol rounds but it makes me feel better about my brass.

[GeoffLinder]

I found flash hole reaming/deburring to be more helpful in uniforming case weight (and therefore internal case volume) than anything else. My SD went way down after this step on my precision long range stuff. I attribute this more to removing excess metal around the flash hole and therefore contributing to uniform case volume. The amount of metal removed was nowhere near the same from case to case (same brand/batch brass) and this tells me the mfgr's don't control internal case dimensions as well as they control external case dimensions

[Stryfe76]

I never though about that aspect of reaming. This may actually be worth while on pistol cases since they're smaller in volume any variations from the factory may affect pressure from round to round more than on a larger case.

[GeoffLinder]

Never bothered trying it on pistol cases. Check the loads SD (Standard Deviation) without reaming and then check it afterwards, if SD gets better, it was worth it, if not, then don't bother. Of course, you need to work with same brand/batch of cases or all this will be moot if you do so with mixed range-pick cases