S510 - a bit worried

S510 - a bit worried

Postby mcmjohnson » Mon Jul 31, 2017 12:53 pm

Hi all, I could do with a bit of advice please. I have a very nice ( unmolested, I believe ) S510 in .22 flavour. I put it over an F1 Chrony yesterday and found it was doing 11.32ft Lbs with RWS Superfields 15.9grains. Pressure was 150bar and it varied between 586 and 600fps. ( Average 593.7 )
I then tried it with JSB Exact Jumbo 5.52 and 15.89 grains. Again, 150 bar, variation was 598 - 605.4 fps with an average of 602fps giving 12.8ft lbs. Oooops!
My question is, should I get a regulator fitted and if so which one? Secondly, as I live in Somerset, is there anyone reasonably local who could fit it? I don't particularly want to post it or drive to the Midlands or further to get it done.
Any advice or opinions welcome. Best wishes,Mark
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Re: S510 - a bit worried

Postby Blackbaronfish » Mon Jul 31, 2017 5:33 pm

Julian Bond... owner of the AAOC lives in Wellington. You can contact him on his spares thread in sales.

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Re: S510 - a bit worried

Postby supergnome » Mon Jul 31, 2017 6:03 pm

Try it with Bisley magnums at 21grains. See what that gives. Then worry if it's well over 12ft/lbs. David.
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Re: S510 - a bit worried

Postby eboswan » Mon Jul 31, 2017 7:18 pm

no don't worry if its well over 12ft/lbs ...worry if its even close to 12ft/lbs
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Re: S510 - a bit worried

Postby Roger5 » Mon Jul 31, 2017 9:36 pm

If the antitamper is out, you should be able to fit an Altaros reg, no drilling of cylinder, so an easy fit, they work very well, just put one in a mates S510, 5fps over a 50 shot string. Rog
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Re: S510 - a bit worried

Postby Archer50 » Tue Aug 01, 2017 7:53 am

Whether you regulate it or not, every gun will give higher power outputs with some pellets than with others and there is no way of changing that. The safe thing to do is to try to find the most efficient pellet for your particular gun - in my experience, for Air Arms guns it's usually one of the heavier JSB's - and adjust until that gives something like 11.7 ft-lb at most. Then, I'm afraid you just have to live with whatever that gives you on other pellets.

Not good news, but I hope it helps you stay legal.

Alan
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Re: S510 - a bit worried

Postby Roger5 » Tue Aug 01, 2017 9:41 am

Archer50 wrote:Whether you regulate it or not, every gun will give higher power outputs with some pellets than with others and there is no way of changing that. The safe thing to do is to try to find the most efficient pellet for your particular gun - in my experience, for Air Arms guns it's usually one of the heavier JSB's - and adjust until that gives something like 11.7 ft-lb at most. Then, I'm afraid you just have to live with whatever that gives you on other pellets.

Not good news, but I hope it helps you stay legal.

Alan

+1 on that. Rog
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