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Old 11-16-2019, 12:17 AM   #1
1tonne   1tonne is offline
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Barrel Diameter 6.01, 6.00 or 5.98mm

So I am wanting the most efficient barrel possible. By efficient I mean, the least air lost around the bb. So obviously, the 5.98mm barrel from Edgi would be best at this. I am a little worried that with 0.48gm BLS bb's it may jam up. I know that they are fine with ceramic bb's but are they fine with plastic BLS 0.48gms? Would they block up.
The second option is an Orga 6.00mm. I currently use these in some of my rifles and they seem good.
The last option, is just an AA 6.01mm which pretty much never block up.


So, what was your experience with the tighter bore barrels like the 5.98mm or 6.00mm with good quality bb's
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Old 11-16-2019, 12:58 AM   #2
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If someone has proof that the Edgi actually has consistent bore diameter (solid, like a bore tester bar or smh, not just caliper measures), I'd like to know. Because the samples I have access to does not confirm that. Yes they are shinny, but the bore diameter varies to a point where their bore diameter claim just doesn't apply.
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Old 11-16-2019, 09:14 AM   #3
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Correct me if I'm wrong, but are tighter bore barrels worse for accuracy? Or is that just some random piece of info that I thought I heard......
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Old 11-16-2019, 12:15 PM   #4
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I have 4 EdGi barrels of a few lengths. One is 6.01, the rest are 6.00. Never ever had a jam, use only BLS .48 and sometimes hpa .48. Used with hpa and spring, great results! I’m tempted to try a 5.98 myself...
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Old 11-16-2019, 05:24 PM   #5
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Even in the most generous case/methodology (largest measured diameter + largest measured compression distance) it seems my BB analysis can't generate a diameter larger than 5.970mm for BLS .48g BBs- if that's worth anything.
https://docs.google.com/spreadsheets...it?usp=sharing
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Old 11-16-2019, 05:49 PM   #6
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I doubt you'd have issues based on what MagicMarker mentioned above. FWIW I've never had issues with any .48s in ANY of my tightbores, but they're all no tighter than 6.01mm.

I am still skeptical of EdGi quality compared to steel barrels and would love to see a proper comparison. Got to handle a number of EdGis at my last OP due to a vendor having some on hand. They were nice, just not for the price. I find it difficult to spend that much for brass when I can't see it improving accuracy that much more beyond what I'm currently achieving...diminishing returns and all.

You mentioned ceramic... wouldn't using those in brass be detrimental?
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Old 11-16-2019, 07:53 PM   #7
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Quote:
Originally Posted by AccurateDMD View Post
Edgi.... They were nice, just not for the price. I find it difficult to spend that much for brass when I can't see it improving accuracy that much more beyond what I'm currently achieving...diminishing returns and all.
The goal is to help with cylinder to barrel efficiency. I need an AEG (Electric Sniper Rifle with 3 second delayer between shots) to be as efficient as possible to get the magic 3.3 joules and for the AEG to last. The more efficient the rifle can be the weaker the spring I can use.


Quote:
Originally Posted by AccurateDMD View Post
You mentioned ceramic... wouldn't using those in brass be detrimental?
Yip it would wear quickly but 5.98mm seems to be the diameter which a lot of people were using with the ceramics. I think that they used ones that were made of steel though.
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Old 11-16-2019, 09:47 PM   #8
 
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The comparison is in a group on facebook. Ill see if I can find it. While I do have a set of gauge pins and barrels, I am not taking my guns apart to test that for you.

Though do be warned, there are fake Edgi products floating around. Most of them are from Europe it seems. Most being barrels but I have seen a few other things that are fakes as well. (I should know I have 2 things that are straight up fakes.) The price tag for Edgi is not the barrels themselves, its the shipping costs from the Philippines that kill you. (and one of the reasons why people mark up those barrels. At least for the brass ones. He does make SS barrels as well.)

There are also fake PDI and Prommy stuff as well. Fake prommy stuff is rampant in asian markets. The fake PDI stuff is in Europe as well. (Have one...)
==========

Anyway.... I would look into a steel barrel. Though good luck finding one tighter then 01 outside of Edgi. I have yet to find one that is actually that size.
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Old 11-16-2019, 10:14 PM   #9
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It would be good to see the comparisons and if they jam. I am mainly after brass but maybe SS depending on the cost
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Old 11-16-2019, 10:35 PM   #10
 
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Never had a jam in my 01 edgi or pdi. Been playing with a lambda 01 barrel. PDI quality without the goofy ass window cut. Shouldn't break the bank for you to get one and its stainless steel. Ball park is around $50 to $60.

Come to think of it, last jam i had was in my lct ak that has sn umbrella armory rhopped prommy 03 in it which resulted in blowing out my bevel gear.
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Old 11-17-2019, 01:35 AM   #11
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I don't think I have ever had a jam in a AA 6.01mm either. Though I had a customer recently who said that they had jams regularly. But I don't know if it was the barrel or faulty bb's.
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Old 11-17-2019, 02:42 AM   #12
 
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I have had a few jams with the AA barrels, which is why I no longer use them. (2 in my guns 3 in customers.) Was not the bbs in those cases as I tested them with different bbs including ceramics. They just jammed up due to some fault. Did not care much to investigate past that or to spend the time to fix them.
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Old 11-17-2019, 08:31 AM   #13
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I'm looking into trying 5.98 myself, but it'll be a while before I pull the trigger on it. I've also been meaning to try ceramics.



That said, just throwing my $0.02 in - some ceramics are the typical 5.935mm, and others are true 6mm. The 5.98mm barrel will work great for the smaller ceramics but not the larger ceramics. The larger ceramics have been historically used with 6.03mm inner barrels, which achieve a similar 'tightness' as the smaller ceramics in 5.98mm inner barrels. But, if you use the larger ceramics you'll get more joule creep, since chrono/lighter bbs are smaller diameter than the larger ceramics.


What I haven't figured out is which size of ceramics is easier to get and cheaper. That will probably dictate which size I end up trying.
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Old 11-17-2019, 10:01 AM   #14
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I figured it was for your AEG build.

If I could find a stainless steel 6.00 or tighter barrel I would be interested in purchasing one regardless of brand (as long as its reputable). Closing thing I can find are the power barrels for hi capas, and none are long enough.

i've yet to see any SS barrels that length and tightness. I've also never seen an Edgi SS barrel, although I've heard they exist.
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Old 11-17-2019, 10:03 AM   #15
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I haven’t used a barrel wider than 6.01 in years. The only jams I’ve encountered were due to bb issues, not bore quality. Sticking to a reputable brand and properly storing bbs goes a long way to preventing issues.

The sole exception I can think of is a 650x6.01 I stuffed in to a vehicle mounted HPA M249 powered off CO2. We were feeding it a mix of EF and BLS 0.32g. When the gunner went hammer down for a solid 5min it finally jammed. Considering that equates to a 5000rnd burst, I can’t really point at anything aside from ridiculousness as cause.

As for ceramic use, I’ve fired thousands out of multiple systems and never had barrel wear.

I’ve also used a lot of EdGi barrels in builds, from BASR’s to pistols, with consistent results. As true to bore as I care to check, a 0.69g bb does not pass through an EdGi 5.98 or 6.00 barrel. In cases where I need to alter a barrel, I much prefer the brass to having to machine 304 stainless.

The EdGi 5.98 I had floating around the shop was, again, as true to spec as I cared to measure and required bbs to be passed though a check tube prior to use. I ended up opting for a different barrel in my own VSR so I could use 0.69g bbs. The current rifle that barrel is in uses 0.45g BLS with few issues. I do recall it jamming once when on loan, though that was likely due to unfamiliar hands triple feeding the rifle.

6.00 are my go to’s anymore, and usually EdGi. On the rare case I go wider, it’s because I pulled it out of my old barrel pile to throw in some random thing I’m working on.
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