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Discussion Starter · #1 ·
So I have a brand new ARES MSR .338 that I swapped a PDI W hold bucking and PDI HD Cylinder into, plus a Srpinger trigger.

Looking for any specific MSR tips to maximize performance, have plans for a replacement barrel (PDI 6.01 if I can source one) with r hop.

As of now I do not have a good air seal whatsoever, trying the finger over the barrel pressure-trick there is no pressure and it only shoots about 170'..
 

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It must be in the connection of bucking and nozzle. The inner barrel might be sitting too far from the nozzle that makes it has loose compression.

If it does sit properly, try to put some teflon tape on to the lip of the bucking. You'll need to be delicate about it so the tape won't mess anything up. The tape would helps tighten the grip of the lip to the nozzle.
 

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Discussion Starter · #3 ·
It must be in the connection of bucking and nozzle. The inner barrel might be sitting too far from the nozzle that makes it has loose compression.

If it does sit properly, try to put some teflon tape on to the lip of the bucking. You'll need to be delicate about it so the tape won't mess anything up. The tape would helps tighten the grip of the lip to the nozzle.
My assumption was the outer/inner barrel was not seated far enough back into the receiver upon reassembly, just curious if any other MSR owners out there had similar issues and found meaningful solutions.

I'll try tape next time I have it apart, thanks for the reply!
 

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My assumption was the outer/inner barrel was not seated far enough back into the receiver upon reassembly, just curious if any other MSR owners out there had similar issues and found meaningful solutions.

I'll try tape next time I have it apart, thanks for the reply!
This is a very likely possibility. The way the outer barrel secures to the receiver is a friction fit and you have to be very particular with the way you ram the thing together and secure it. Back when I had one of these rifles, I used the hop up chamber hole as my guide to see if the barrel was pushed back all the way into the receiver. It should line up perfectly with the hole in the upper rail. Other than that though, there's not really many tricks to fixing the air leak. Maybe double check the nozzle and cylinder are the same length as the original.
 

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Discussion Starter · #5 · (Edited)
This is a very likely possibility. The way the outer barrel secures to the receiver is a friction fit and you have to be very particular with the way you ram the thing together and secure it. Back when I had one of these rifles, I used the hop up chamber hole as my guide to see if the barrel was pushed back all the way into the receiver. It should line up perfectly with the hole in the upper rail. Other than that though, there's not really many tricks to fixing the air leak. Maybe double check the nozzle and cylinder are the same length as the original.
I'm using a longer screw for the hop up adjustment that sticks out of the rail so that's probably out... Didn't think I put it back together wrong lol

I'll look things over vs the stock set when I take it apart again to install a barrel whenever I get one
 

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If your outer barrel sits correctly, then I'm sure the problem lies on the bucking or the nozzle. Try to unscrew the nozzle for a bit like 0,5mm so it protrudes more to the bucking. This is not a recommended solution, I would try this only to confirm the leak.
 

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Discussion Starter · #8 ·
Going to take it apart as soon as I get a barrel ordered and it's delivered.

Was doing some research, PDI's MSR barrel is 460mm but from my research 430mm is generally considered optimal.
I assume 3cm isn't the end of the world as far as dead space goes in the outer barrel, but not sure if the MSR barrel has special cuts for the ARES hopups.

WWYD?
 

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Discussion Starter · #9 ·
Nevermind..

I think the inner of the 2 piece flash hider is what actually holds the barrel steady within the outer barrel so I'm going to play it safe and get the 460mm
 
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