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Posted: 3/26/2009 3:49:12 AM EDT
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I'm relatively new to reloading. Ran into a few problems last night using once-fired black hills brass. On about a half dozen rounds, the 175gr MK bullet got slightly shaved, leaving a small sliver of copper protruding upward out from the casing. I trimmed the excess off, but am a little concerned about whether this extra pressure at the neck could be dangerous - or if it will just hurt accuracy slightly. I only had this problem with about 5 out of 40, but I obviously need to do some work on the necks in the future.
So this being the first time I've encountered this, my questions are: 1. How badly will this affect the accuracy of the bullet? 2. Is it dangerous to fire these rounds (cartridge detonation, etc) 3. Could the scraping damage my barrel in any way? Thanks. |
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Thanks. I was a little concerned about any extra copper under the neck causing an increase in pressure.
I shoot at 600 most of the time, so I guess if these are safe to shoot, I'll have to give it a try and see what happens. I've got the particular rounds marked in my ammo box, so it'll be interesting to see if they fly any different. I suppose I can always use them as sighters if they show signs of instability. |
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I was worried about it at first too - but its extremely unlikely to cause you any safety problems. You'd have to jam a bunch of copper between the bullet and the neck to cause pressure problems, and that shaving you see usually doesn't get stuck deep enough in the neck to matter.
I would start chamfering to avoid the issue altogether. I forgot to chamfer my new Win brass the first time I loaded it (old habits die hard - I only thought of chamfering as a step involving in trimming) and the brass shaved a few of my 175 SMK's. At $.30 each I was a little concerned - but it turned out to be a non issue. |
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Quoted:
I'm relatively new to reloading. Ran into a few problems last night using once-fired black hills brass. On about a half dozen rounds, the 175gr MK bullet got slightly shaved, leaving a small sliver of copper protruding upward out from the casing. I trimmed the excess off, but am a little concerned about whether this extra pressure at the neck could be dangerous - or if it will just hurt accuracy slightly. I only had this problem with about 5 out of 40, but I obviously need to do some work on the necks in the future. So this being the first time I've encountered this, my questions are: 1. How badly will this affect the accuracy of the bullet? 2. Is it dangerous to fire these rounds (cartridge detonation, etc) 3. Could the scraping damage my barrel in any way? Thanks. No big deal, I't's probably not going to cut it for 800-1000 yard optimal accuracy but I'd doubt you would see anything at 200-300 yards outside of normal distribution. I'm guessing, I've never done a scientific test. (I've shaved bullets though  ). I have read articles on reloading deliberately scuffed bullets (sandpaper or light file marks) and they were slightly off. Been years since I read that article though. It may have been a Rick Jamison reloading piece.
If you don't already have a chamfering tool, I suggest buying one to chamfer your cases. If I were to choose between the standard chamfer tool and the newer VLD chamfering tool, I'd get the VLD one. |
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