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Old 04-25-2020, 09:45 AM   #1
Vsr10   Vsr10 is offline
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No matter what bucking, i still can't solve stupid curving to the right after 70+m
First i use stock bucking, shim the arm and sand it a little in this shape on picture, and i got 65-70+m dead straight bb fly path, but hop up can't hop any more of that, 0.43 and max set up hop gets 70m range, before sanding arm, i got about 85m of range but after 65-70m bb curve to the right, sometimes goes 85m dead straight but rarely, so i make bigger that fangs on arm and now it can hop up 0.43 with about 40% hop, still i get 65-70m effective range but after that bb goes right,i then put the ML decepticon 60 and got 90+m of range but same 65-70m of effective range..
So what can be a problem?
Hop up is stock but arm i so good shimmed that she doesn't have 1% of play, maybe is the bad bb manufacture, what do you think of this mark of bb?
Only one more thing that i think that can cause problem is the arm position in hop up, one side of arm have in build shim, and is a fraction of mm moved to the right in hop up, maybe i need to sand arm and shimming it to both sides, to be a dead straight on middle in hop up

Set up is
pps cylinder kit
Rapax 3+
ML decepticon 60
6.03 steel barrel 430mm
Air seal cylinder to end of barrel is perfect, no air leaks at all

Last edited by Vsr10; 04-25-2020 at 09:52 AM.
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Old 04-27-2020, 05:08 AM   #2
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outer barrel might be screw in to much or to little , there is small play between barrel and receiver ( set screw is smaller than whole in barrel ) try to twist barrel cw looking from front off gun , if not working you need to go for TDC or aa chamber
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Old 04-27-2020, 05:29 PM   #3
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Do you have a picture of the nub? A pic from front on and side on?
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Old 04-27-2020, 06:41 PM   #4
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I don't think he has a nub. That is likely the issue, along with using the stock chamber and a decepticon bucking instead of autobot or MR Hop.
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Old 04-27-2020, 07:10 PM   #5
1tonne   1tonne is offline
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Oh. It is a stock hopup. In that case the stock hopup has a tendency to curve right especially with heavy bb's and also as the hopup gets older. The reason being is that rod that sticks through the hopup arm can bend a little. This means that it has more pressure on the right hand side of the bucking.
Get yourself an Action Army hopup chamber and then you will be onto a winner. It will also most likely increase your fps because it will have a better air seal.
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Old 04-27-2020, 11:24 PM   #6
Vsr10   Vsr10 is offline
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I don't have nub, just stock arm that i modified, i think this may be problem

Arm is to much the right, i sand and shimmed the arm, just wait opportunity to test, arm that i modified is basically similar like on the ssg24, part which make pressure to bucking i make bigger and sand through the middle like on this pic below, and that increases accuracy a loooot more, to about 70m,after its started to curve, arm is now straight in middle and will test it soon
Attached Images
File Type: jpg IMG_20200428_061729_1588047460333.jpg (86.0 KB, 13 views)
File Type: jpg heavyHopUpArm_1588047694108.jpg (51.4 KB, 12 views)
File Type: jpg IMG_20200405_110941_1588047712869.jpg (38.0 KB, 13 views)

Last edited by Vsr10; 04-28-2020 at 08:02 AM.
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Old 04-28-2020, 08:29 AM   #7
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Quote:
Originally Posted by AccurateDMD View Post
I don't think he has a nub. That is likely the issue, along with using the stock chamber and a decepticon bucking instead of autobot or MR Hop.
whats wrong with decepticon , i found them very accurate up to 60 m i dont have experience with longer shot as 1 j limit
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Old 04-29-2020, 06:37 AM   #8
Vsr10   Vsr10 is offline
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Quote:
Originally Posted by matikmat View Post
Quote:
Originally Posted by AccurateDMD View Post
I don't think he has a nub. That is likely the issue, along with using the stock chamber and a decepticon bucking instead of autobot or MR Hop.
whats wrong with decepticon , i found them very accurate up to 60 m i dont have experience with longer shot as 1 j limit
Stock bucking can be accurate dead on up to 60-70m with little arm modification, mine with stock arm and bucking is accurate to 60m,can hit 15x15cm target 10/10 shots, but after that range problem stars, until i get AA hop up this will do
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Old 04-29-2020, 07:35 AM   #9
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The decepticon bucking ends in a single point where as the autobot has a double point on the end. The difference is contact area on the bb along with giving you a bit more room for error on the install if the bucking isn't PRECISELY centered.
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