Unexplained Joule/FPS Loss - Airsoft Sniper Forum
       

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Old 07-04-2020, 05:32 PM   #1
Young Gun
 
Join Date: Jul 2020
Location: Southern Ontario, Canada
Posts: 3
Unexplained Joule/FPS Loss

Hi all,

When I recently upgraded my SRS-A1, 22" I had it running with the following parts:
  • TNT Studio S+ SRS Bridged Inner Barrel. 570mm
  • TNT Studio TR-Hop gen 2 bucking 2-pack SRS 50
  • Stalker Tigra Nub
  • FAST Hop Unit set to 2
  • WASP Piston, Steel Weight
  • Rapax 2+J spring with small Rapax spacer

I was averaging 1.73 joules, then I decided to order the SRS hopup/barrel alignment tool from Skirmshop due to constantly struggling with properly lining up the internals.

It arrived this week and I went to put in my TNT 60 bucking, after reassembling I'm now averaging 1.3 joules with the FAST hop set to 0. I thought I messed up some air seal issues, stripped it down, and put it back together with the 50 bucking, and same issue. I also can't seem to get it to go past 1.4 joules regardless of what I try; such as adding more spacers and changing spring to an M160.

My principle concern is that there's air seal loss somewhere in the FAST unit, and I've tried the PTFE seal but the tolerances are so damn tight that even using silicone oil the FAST unit distorts the bucking on the barrel and/or strips off the PTFE tape.

My secondary concern is that I somehow warped my barrel using that alignment tool, but I find that difficult to grasp considering the barrel is made of steel and I didn't even come close to over tightening the screws on it to secure the barrel.

I'm trying to get my SRS to at a minimum of 1.8 joules to still be under my field's limit, and was looking forward to playing this coming Saturday on their opening day thanks to Covid restrictions lifting.

Any suggestions or advice someone could offer would be greatly appreciated. I'm pulling my hair out with wtf is going on here.
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