AlphaBear
Members
- Feb 4, 2020
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The MPA 'valve' was sacked due to coming loose despite threadlock etc and I read on here at the time Ra tech was the way to go and it has been great and fits well in the ag nozzle which was swapped from the original after minor damage when the nozzle return spring finally snapped (5000 RDS I reckon).
As for the lower readings on the spread sheet that is because 1. I was shooting 0.30's and 2. I was playing some very close cqb trying out a possible new site and I wanted lower joules.
Skip to the 25th October I've wound it open again for field play and winter. Blue is propane, yellow is a test of Mapp gas (rothenberger).
(Edit - the diff' is the difference between max and min FPS over 10 shots fired)
As for the consistency initially I thought it was due to magazine age and type, mags 1,2 and 3 I believe are the older type 1 magazines 4,5 and 6 type 2's, all are shot in the same conditions at the same time on propane filled to the top (liquid gas spurting) with the same batch of bb's. all are green gas modified (cut 10mm past the valve) and I believe the greater variance is easily made up for with the larger capacity of gas which doesn't appear to affect accuracy at all giving me approximately 50mm groups. The mags are weighed prior to bb's to ensure their full, I believe if they were less full i,d get better consistency.
What would be cool if anyone interested next time they do a test they add their results to the XL sheet for comparison which could be a good benchmark for certain setups?
Cheers
P.s. I've changed the link to allow anyone to comment or edit - go wild folks, suggest copying file tabs for your own results, test conditions at the bottom.
P.P.S same rules as this forum exist - be nice people - constructive comments only please. Admins hope you ok with this? If not will upload bare one for copying?
https://docs.google.com/spreadsheets/d/1lfmKJtQm-qGtE-EJLlXXixfkon5uT6nDdt7BJOOOb1o/edit?usp=drivesdk
I like your scientific method of testing and recording the results... it's quite an eye opener and will for sure lend to much debate going forward... well it should
In terms of BB's which brand are you using? I assume there is no variation in the brand yeah?
Regarding the AG MPA nozzle, yeah that valve does look a tad suspect (blue loctite or not)... it definitely needs replacing as you said you used a RA tech valve.
I've yet to do the green gas mod on any of my V2 mags... I believe the metal tubes inside are now glued on so have to be cut down... (thanks Marui)!
cheers