100+ Shots from my AA S510 Xtra - I'm on to something here...

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Matt_Dubber

Member
May 5, 2015
160
59
Eastern Cape


A few months ago I uploaded initial chrony results with the Lane regulator in my S510 - You can see these results in the graph above:

-The RED line shows the original shot string straight out of the box (no reg)
-The BLUE line shows results with the reg set to 135 Bar, no tweaking.
-The ORANGE, GREEN & YELLOW lines show an attempt to increase shot count by tweaking transfer port, valve return spring, etc.

Even though the results were WAY better than the original unregulated mountain of a curve, I couldn't seem to get more than 50-55 shots without sacrificing a lot of power. The curves weren't completely flat either, which was a little disappointing.

And then I made the decision to shorten the hammer spring a little bit. I realised that the Air Arms rifles were losing a LOT of air through hammer bounce. The design seems a little silly, with constant spring tension on the valve even when the gun wasn't cocked. In theory, shortening the hammer spring by a few millimetres should "free float" the system a little and stop hammer bounce.

I cut the spring to 55mm, thinking "what the hell am I doing"...And what to you know!

The PURPLE line shows results with the hammer spring shortened. The string starts at 250 Bar, and ends at 100. The peak in the curve is because the gun goes off the reg at 135 Bar - But the peak is only 10fps higher than the rest of the curve, so I'm happy to shoot down to 100 without worrying about dramatic rises/drops in velocity.

I know people who are achieving even better results by lightening the hammer as well. This, in theory, should reduce inertia and enable the valve to close faster. I'll get to that at another stage.
 
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I'm not sure anything had to be upgraded after the regulator install but I'm curious to hear his response also. If I recall correctly Matt said in his regulator installation video that the tube would hold that much pressure no problem. He's probably sleeping in SA so I don't expect he'll post back until we're all sleeping here.

All the best, 
Cliff
 
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"blackdiesel"How did you determine you could fill to 250 bar after the reg install?
Click to expand...
Good question. The Air Arms cylinders are made to hold 300 Bar. The only reason they have "max pressure 200 bar" printed on the side is because without the reg, the valve/hammer system can't handle the extra pressure. It would be pointless shooting above 200 Bar without the reg because the valve would just lock. But with the reg you can fill much higher.

I was at the Air Arms factory a few weeks back and spent a whole afternoon trying to convince them to regulate their high power guns as standard. They seemed pretty interested when they saw my results, so I'm keeping my fingers crossed that there will be changes when they announce their "new product" at the SHOT Show in 2 months! :)
 
Upvote 0
"Cricket"
"Matt_Dubber"
"blackdiesel"How did you determine you could fill to 250 bar after the reg install?
Click to expand...
Good question. The Air Arms cylinders are made to hold 300 Bar. The only reason they have "max pressure 200 bar" printed on the side is because without the reg, the valve/hammer system can't handle the extra pressure. It would be pointless shooting above 200 Bar without the reg because the valve would just lock. But with the reg you can fill much higher. I was at the Air Arms factory a few weeks back and spent a whole afternoon trying to convince them to regulate their high power guns as standard. They seemed pretty interested when they saw my results, so I'm keeping my fingers crossed that there will be changes when they announce their "new product" at the SHOT Show in 2 months! :)
Click to expand...
Great Matt! I don't think producing high end air rifles without regulators is even an option today. The fact that Air arms s510 and s410 are even sold without one is beyond me....
Click to expand...
That would be the icying on the cake for AA's. Just make it an option and I think they would be surprised at the added sales. I think there carbine version would be a hot seller. Can you imagine a 12fpe 177's shot string.
jk
 
Upvote 0
"Cricket"
"Matt_Dubber"
"blackdiesel"How did you determine you could fill to 250 bar after the reg install?
Click to expand...
Good question. The Air Arms cylinders are made to hold 300 Bar. The only reason they have "max pressure 200 bar" printed on the side is because without the reg, the valve/hammer system can't handle the extra pressure. It would be pointless shooting above 200 Bar without the reg because the valve would just lock. But with the reg you can fill much higher.

I was at the Air Arms factory a few weeks back and spent a whole afternoon trying to convince them to regulate their high power guns as standard. They seemed pretty interested when they saw my results, so I'm keeping my fingers crossed that there will be changes when they announce their "new product" at the SHOT Show in 2 months! :)
Click to expand...
Great Matt! 

I don't think producing high end air rifles without regulators is even an option today. The fact that Air arms s510 and s410 are even sold without one is beyond me....
Click to expand...
I agree with you...But at the same time, there are guns like the Daystate Wolverine that shoots insanely consistent despite being unregulated. I own the Wolverine and I'm very happy with the 80-90 shots it gives me. That being said though, with a reg fitted the Wolverine would probably give 120-150 shots quote easily!
 
Upvote 0
jking
"Cricket"
"Matt_Dubber"
"blackdiesel"How did you determine you could fill to 250 bar after the reg install?
Click to expand...
Good question. The Air Arms cylinders are made to hold 300 Bar. The only reason they have "max pressure 200 bar" printed on the side is because without the reg, the valve/hammer system can't handle the extra pressure. It would be pointless shooting above 200 Bar without the reg because the valve would just lock. But with the reg you can fill much higher. I was at the Air Arms factory a few weeks back and spent a whole afternoon trying to convince them to regulate their high power guns as standard. They seemed pretty interested when they saw my results, so I'm keeping my fingers crossed that there will be changes when they announce their "new product" at the SHOT Show in 2 months! :)
Click to expand...
Great Matt! I don't think producing high end air rifles without regulators is even an option today. The fact that Air arms s510 and s410 are even sold without one is beyond me....
Click to expand...
That would be the icying on the cake for AA's. Just make it an option and I think they would be surprised at the added sales. I think there carbine version would be a hot seller. Can you imagine a 12fpe 177's shot string.
jk
Click to expand...

I'll be regulating my s500 extra fac model for wftf over the winter and will post the results when its done.
 
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