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when preparing new brass for re-loading I deburr the flash hole as part of the routine. Having aquired some once fired RWS brass, is flash hole deburring required, or can one assume the firing has done all the deburring needed? any ideas, anyone?

Deburr..... unless you know that whoever prepared the cases originally has already done so.

for the sake of a bit of time it's worth doing just ensure they're even

just my tuppence worth :cheers:

Alan

zeroveez wrote:when preparing new brass for re-loading I deburr the flash hole as part of the routine. Having aquired some once fired RWS brass, is flash hole deburring required, or can one assume the firing has done all the deburring needed? any ideas, anyone?

Between being drilled at manufacture and then cleaned-up by the initial firing I think it is unnecessary and they are best left. Some suggest that it may even be counter-productive to do it with good quality brass, possibly introducing variation to the chamfer depth, or opening-up the flash hole on some more than others etc. I've never done it even with once-fired cheaper brass (presumably punched) and it still shoots 1/2 a minute at 1000x unrested with irons, so any effect would be too small for me to see and the results are more than adequate for our 'easy' targets.

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Also I do not full depth uniform the primer hole first shot, I prefer to just seat the primer, shoot the brass and then uniform it.

I think that the answer with deburring flash holes and uniforming primer pockets is 'minimalism'..... you are NOT looking to cut great swathes of brass off .... with deburring it is a gentle turn or two ..... with pockets its usually just squaring up any rounding at the outside edge of the pocket where it was drilled with a radius.

No harm done with a gentle touch and its a one-off usually unless the pockets get shallow after many firings.

I all ways de burr primer pockets its a job you do once. I have found that it does make a difference.
I bought 100 Lapau 7.62x54 cases I had a heck of a job seating primers a quick turn on my Lyman trimmer with a primer pocket reamer fixed the problem and no difference in performance of the cartridge.
I have done so for years with out any affect on my re loads performance.

My own choice is to de-burr the flash hole every time I re-use a case.

But then, I don't shoot as well as Rox does, and he doesn't!

However, it does take out one variable and I need to reduce as many as I can.

A de-burring tool with a guide which prevents you taking off too much brass, merely allows you you uniformly size the Flash hole is my choice.

As I say, it's about reducing the variables.

:cheers:

I am grateful for all the views expressed. Having used Lapua brass for TR, where the holes are drilled, I have never bothered to deburr. However, with American sourced brass, primarily used in a sporting rifle, I always deburr. My sporting rifle will group marginally worse than 1/4 min at 100 metres. Can I assume that RWS, like Lapua, has flash holes that are drilled? Primer pocket uniforming is another issue, which with me, depends on the weather and how I feel having got out of bed that morning.

zeroveez wrote:Can I assume that RWS, like Lapua, has flash holes that are drilled?

That is my understanding, as I inferred - perhaps unclearly, at least for commercially sourced RWS brass. Whether ex NRA RUAG is any different (if indeed that is what you have) I can't be 100% sure, but I would expect so.

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