I reload everything I shoot. Been doing it since 1965. Lately noticed that some lots of military .223/5.56X45 brass has a high number of cases with eccentric flash holes. Has anyone done accuracy comparisons of centered flash holes and eccentric flash holes and compared the accuracy for each? I have about a hundred brass that I have culled and realize that if I were a bench rest shooter that they are not what I would care to load but for 3 gun competition where I lose the brass anyway would they be significantly less accurate than brass with centered flash holes? I do weigh and sort my .223 brass. I'm just trying to determine if I need to trash the brass or can I reload it for general but not precision use. If there's only a 1/4" difference in group size @100 yds then that is good enough for me. If there is a 1" difference in group size then they're toast. I'm curious to know if anyone has actually shot eccentric flash hole brass to compare it to normal brass rather than just out of hand condemn it. What was the difference in group size?
Eccentric flash holes....How big of a problem for accuracy?
- Thread starter Hellgate
- Start date
- Status
788Ham
Member
What is your meaning, "Eccentric flash holes"? Not aware of your meaning.
rcmodel
Member in memoriam
No noticeable difference in my experiance.
There are more importent fish to fry in the grand quest for accuracy.
It's not desirable certainly.
But if ultimate accuracy is you goal?
You should probably be using new Laputa brass instead of mixed GI machine gun brass.
rc
There are more importent fish to fry in the grand quest for accuracy.
It's not desirable certainly.
But if ultimate accuracy is you goal?
You should probably be using new Laputa brass instead of mixed GI machine gun brass.
rc
788Ham
Member
I've got a handheld device that you insert into the mouth of the cartridge case, has a small drill bit like device on the end, fit it into the flash hole, slowly rotate it. 99% of the time, you'll have a centered flash hole. I know it takes some time, but i've saved "new" brass that didn't have a square centered hole.
FROGO207
Member
I shoot all types of MIL brass such as you are speaking of without sorting and now actually inspecting some I see this with some of mine also. That said I have a bolt 223 that is capable of better than 1/4 MOA all day long if I do my part. I shoot that mixed brass 300 to 500 rounds at a time some sessions without worrying about flash hole issues and it is some accurate. If not bench resting at 1000 YDS why worry??
ironworkerwill
Member
Several meanings to that word. But R.C. is right as usual.
Last edited:
Jesse Heywood
Member
Laputa is a fictional place from the book Gulliver's Travels by Jonathan Swift. It is a fictional flying island or rock, about 4.5 miles in diameter, with an adamantine base, which its inhabitants can maneuver in any direction using magnetic levitation.
Didn't the OP ask for magical brass?
Didn't the OP ask for magical brass?
ironworkerwill
Member
A mythical land where importance is placed on the impractical
RCmodel,
Did you mean Lapua brass? I know it is very high quality.
I guess I won't worry about off center flash holes if there is no significant difference in accuracy.
Frogo,
I too, have shot very tight groups before I bothered to check for flash hole centricity.
Did you mean Lapua brass? I know it is very high quality.
I guess I won't worry about off center flash holes if there is no significant difference in accuracy.
Frogo,
I too, have shot very tight groups before I bothered to check for flash hole centricity.
tightgroup tiger
Member
It kinda seems to me that RC's Laputa and Lapua almost have the same meaning in this context.
Especially after Walkalong and the op said that they have both shot very tight group with this brass with off centered flash holes.
I guess that's your answer.
ironworkerwill
Member
^Zactly
blarby
Member
^^^^
When you've got to the point where you are wringing accuracy out of the brass, thats about as good as its gonna get.
Grumulkin
Member
As Walkalong noted, you would need skill and a very accurate gun to prove whether or not eccentric flash holes detracted from accuracy. Some angst about dirty primer pockets and I don't; of course since I started using stainless steel pins my primer pockets are clear anyway. It seems logical to me that eccentric flash holes could cause inconsistent ignition so I discard such cases.
I make no apology for this my idiosyncracy.
I make no apology for this my idiosyncracy.
- Status
