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Old 06-27-2019, 08:36 AM   #1
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Barrel Length?

I just received my JG Bar 10 and I am in the process of ordering parts. This will be my first upgrade and I have all the parts worked out, AA trigger, piston set, AA hop up, ML bucking, AA spacers, etc.

I was looking at PDI or AA inner barrel 6.01 to 6.05. The AA 6.03 I was going to buy is 4.30 length, but they are out of stock at my local store. They have a PDI 6.05 with 3.03 length? Is that too short?

In relation to tightness. I read 6.01 is better for shorter accuracy and 6.05 better for longer accuracy.

What is the length of the stock inner barrel in the JG Bar-10?
Are you restricted by the length of inner barrel you use by the length outer barrel? Would you not have too add an extension to the outer barrel?
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Old 06-27-2019, 08:55 AM   #2
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6.01 is better for accuracy. Period.

303mm isn't too short, but you will need to use .43g bbs or heavier if you're shooting near 500fps on .2g.

You can use whatever length inner you want. Can always add a suppressor or internally suppress the gun.
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Old 06-27-2019, 09:03 AM   #3
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Quote:
Originally Posted by john3302 View Post
I just received my JG Bar 10 and I am in the process of ordering parts. This will be my first upgrade and I have all the parts worked out, AA trigger, piston set, AA hop up, ML bucking, AA spacers, etc.

I was looking at PDI or AA inner barrel 6.01 to 6.05. The AA 6.03 I was going to buy is 4.30 length, but they are out of stock at my local store. They have a PDI 6.05 with 3.03 length? Is that too short?

In relation to tightness. I read 6.01 is better for shorter accuracy and 6.05 better for longer accuracy.

What is the length of the stock inner barrel in the JG Bar-10?
Are you restricted by the length of inner barrel you use by the length outer barrel? Would you not have too add an extension to the outer barrel?
I just found the stock barrel is 4.33 mm
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Old 06-27-2019, 12:22 PM   #4
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Quality steel barrel.

You ask all the same questions in all the different threads, for ex.:
https://www.airsoftsniperforum.com/4...er-barrel.html

https://www.airsoftsniperforum.com/4...-upgrades.html

https://www.airsoftsniperforum.com/4...hamber-44.html last posts, probably even more examples, but I couldn’t be bothered.
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Old 06-27-2019, 03:07 PM   #5
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0.3gm bb use a 554mm barrel (15821 mm^3) = 2.26:1
0.32gm bb use a 530mm barrel (15136 mm^3) = 2.36:1
0.36gm bb use a 500mm barrel (14279 mm^3) = 2.51:1
0.4gm bb use a 470mm barrel (13422 mm^3) = 2.67:1
0.43gm bb use a 430mm barrel (12279 mm^3) = 2.92:1
0.45gm bb use a 400mm Barrel (11423 mm^3) = 3.13:1


I don't think bore diameter matter too much unless you go 6.00mm or less. So 6.01mm and above are fine. My personal opinion is that tighter bores create more energy which is what we want. So get a 6.01mm.
Action Army AEG barrels will fir a VSR bucking and they will also fit into a AA VSR10 hopup chamber. So consider an AA AEG barrel.
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Old 06-27-2019, 11:12 PM   #6
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Quote:
Originally Posted by Leetworld View Post
Quality steel barrel.

You ask all the same questions in all the different threads, for ex.:
https://www.airsoftsniperforum.com/4...er-barrel.html

https://www.airsoftsniperforum.com/4...-upgrades.html

https://www.airsoftsniperforum.com/4...hamber-44.html last posts, probably even more examples, but I couldn’t be bothered.
If you read the previous posts closely there is no mention of inner barrel length only barrel inner diameter.

Airsoft has been around for 30 years and I assume much is based on physics, aerodynamic, science etc. but then when you search all the forums all you get is mostly varying subjective opinions with many stating their opposing opinions are based on science. You would think by now the airsoft world would know if a tighter or longer barrel would give you more or less accuracy or range, but the more you read online the more confused you get.

If I listen to some of the opinions online , all I should do is throw in a quality hop up, trigger, piston and spring and all the other upgrades are a complete waste of money only done by indulgent people who are deluded into thinking they work, just like some think their guns shoot consistently and accurately over 300 feet.

So in the end, all you can do is ask for more opinions and sort through it all and maybe find some hint of truth along the way.

Last edited by john3302; 06-28-2019 at 08:17 AM.
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Old 06-27-2019, 11:14 PM   #7
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Originally Posted by AccurateDMD View Post
6.01 is better for accuracy. Period.

303mm isn't too short, but you will need to use .43g bbs or heavier if you're shooting near 500fps on .2g.

You can use whatever length inner you want. Can always add a suppressor or internally suppress the gun.
Thanks Accurate. you have been a great help helping me sort through the confusing world of airsoft.
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Old 06-27-2019, 11:20 PM   #8
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Quote:
Originally Posted by 1tonne View Post
0.3gm bb use a 554mm barrel (15821 mm^3) = 2.26:1
0.32gm bb use a 530mm barrel (15136 mm^3) = 2.36:1
0.36gm bb use a 500mm barrel (14279 mm^3) = 2.51:1
0.4gm bb use a 470mm barrel (13422 mm^3) = 2.67:1
0.43gm bb use a 430mm barrel (12279 mm^3) = 2.92:1
0.45gm bb use a 400mm Barrel (11423 mm^3) = 3.13:1


I don't think bore diameter matter too much unless you go 6.00mm or less. So 6.01mm and above are fine. My personal opinion is that tighter bores create more energy which is what we want. So get a 6.01mm.
Action Army AEG barrels will fir a VSR bucking and they will also fit into a AA VSR10 hopup chamber. So consider an AA AEG barrel.
Thanks.
I was thinking of sticking with a AA barrel to match the AA hop up. I know some opinions are that a 6.04 or 6.05 is better at longer range and 6.01 better at shorter range.

Would not the heavier bb [ .4 or higher] require more fps or is the AA hop up sufficient?
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Old 06-27-2019, 11:26 PM   #9
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Quote:
Originally Posted by AccurateDMD View Post
6.01 is better for accuracy. Period.

303mm isn't too short, but you will need to use .43g bbs or heavier if you're shooting near 500fps on .2g.

You can use whatever length inner you want. Can always add a suppressor or internally suppress the gun.
I think I have finally decided on a AA 6.01 x 430 mm. Atlanta Airsoft has one in stock. So I won't have any more inner barrel questions for a few years.
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Last edited by john3302; 06-28-2019 at 07:50 AM.
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Old 06-27-2019, 11:32 PM   #10
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430mm is a good all round length. You can fire up to 0.43gm and have sufficient air in the cylinder to push them out with no suck back effect.
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Old 06-28-2019, 07:11 AM   #11
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I use 430mm x 6.01. .43g bbs. Good results. 515fps with .2g. 400fps with .43g. I use a weighted piston to get more joule creep.

I may experiment with .45g bbs just to see if I get any more joules than with .43g, but it is unlikely. Again, you have to experiment and try things to see if they work sometimes.

When it comes to reading things on these forums, I wouldn't go back farther than a couple of years if you're looking for current and accurate information. That rule does not apply to stickies at the tops of the forums, but even in those threads I recommend reading every post from start to finish as finer details about the topic often change as more people experiment and do testing. You can often see an idea or topic evolve through time when reading those threads.

Crazy jet barrels are a perfect example. Lots of hype when they came out, and lots of good reports on results. However, now we have a better idea of how they actually perform based on many different pieces of information coming together to allow more detailed testing. CJ barrels are great barrels for the price, however they perform best in guns that are highly overvolumed. In a volume matched gun, for instance, a VSR running a 430mm barrel with .43g bbs, a quality steel barrel will outperform the crazy jet.
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Old 06-28-2019, 08:10 AM   #12
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Originally Posted by AccurateDMD View Post
I use 430mm x 6.01. .43g bbs. Good results. 515fps with .2g. 400fps with .43g. I use a weighted piston to get more joule creep.

I may experiment with .45g bbs just to see if I get any more joules than with .43g, but it is unlikely. Again, you have to experiment and try things to see if they work sometimes.

When it comes to reading things on these forums, I wouldn't go back farther than a couple of years if you're looking for current and accurate information. That rule does not apply to stickies at the tops of the forums, but even in those threads I recommend reading every post from start to finish as finer details about the topic often change as more people experiment and do testing. You can often see an idea or topic evolve through time when reading those threads.

Crazy jet barrels are a perfect example. Lots of hype when they came out, and lots of good reports on results. However, now we have a better idea of how they actually perform based on many different pieces of information coming together to allow more detailed testing. CJ barrels are great barrels for the price, however they perform best in guns that are highly overvolumed. In a volume matched gun, for instance, a VSR running a 430mm barrel with .43g bbs, a quality steel barrel will outperform the crazy jet.
Thanks accurate. I've been reading everything I can find online and watching videos. There is one upgrade that practically everyone is on agreement on. The AA hop up.

Just got my Bar-10 delivered yesterday and took it out to test. Shoots about 200 feet with hop up set in the middle using .30 bb's. Now I just have to wait for my upgrade parts.

I was just thinking of leaving the stock cylinder in for now. I am going to upgrade with the AA hop up, AA 6.01 inner barrel, spacers, ML 70 degree bucking and a ML nub. I will test the range and accuracy for a few weeks then replace the trigger and piston with AA parts. I'm curious to see if a better piston has any affect on range. After that, I will put a new spring and spring stopper in and try to get my FPS as close to 480 as possible.
I can then test different weight bb's. As I mentioned before, I have access to acreage 10 minutes from my home where I took a yardage wheel and measured different yardages and placed plywood man sized targets at them.

This is my first upgrade, so I am excited to get started, hence all my questions.
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Old 06-28-2019, 08:39 AM   #13
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So pistons can be either really simple or more complicated.

If you want simplicity just pick an upgraded 90 degree piston and be done with it.

If you really want to get into fine tuning for joule creep, airbraking, etc, then look into something like the WASP piston. I have a thread on it in the VSR forum discussing different results with different set ups and springs.

As you're just starting out I would personally not recommend a WASP as you'll be juggling enough variables as it is getting your rifle dialed in. After you've played with it for a year or two maybe then consider it if you really want to get into more tinkering. You can always add lead tape to any standard 90 degree piston if you want to until then.
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Old 06-28-2019, 03:03 PM   #14
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Quote:
Originally Posted by AccurateDMD View Post
I may experiment with .45g bbs just to see if I get any more joules than with .43g, but it is unlikely. Again, you have to experiment and try things to see if they work sometimes.

Using a 430mm inner barrel and swapping from 0.43gm to 0.45gm, you won't get any energy gain. If you change to a 400mm inner barrel and use 0.45gm bb's you will probably only gain about 0.03 joules. So not much. I guess if you are to aim for perfection you might swap the inner barrel.
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