Under powered s410

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Outandabout
Posts: 723
Joined: Tue Feb 17, 2015 8:13 pm
Location: Bishop Auckland Co Durham

Under powered s410

Fri Jul 17, 2015 1:44 pm

Hi all
Just ran a chrono scan on my S410. I did a few 5 shot strings fron 150bar down to 130bar. It shows my gun to be running at 8.4f/lbThere was also 4 odd readings of over over 10f/lb
Does anybody know the best way to increase the power up to approx 11f/lb, as i only use the gun for hunting and would like it at a decent power to avoid just injuring quarry. I now it will drop rabbits at 8.6flb but I would feel better if it was running at approx 11flb
Thanks
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Blackbaronfish
Posts: 3690
Joined: Sun Feb 15, 2015 6:20 pm
Location: Nuneaton

Re: Under powered s410

Fri Jul 17, 2015 2:34 pm

When did you last clean the hammer rail?

BBF
Did I mention that I'm the only one to have attended EVERY meet since we started
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Outandabout
Posts: 723
Joined: Tue Feb 17, 2015 8:13 pm
Location: Bishop Auckland Co Durham

Re: Under powered s410

Fri Jul 17, 2015 2:39 pm

Cleaned and polished it about 4 months ago. It will probable be a good place to start.
Thank BBF.
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Hairybiker59
Posts: 181
Joined: Fri May 29, 2015 11:42 pm

Re: Under powered s410

Sun Jul 19, 2015 12:02 am

Blackbaronfish wrote:When did you last clean the hammer rail?

BBF

What does cleaning the hammer rail actually achieve?
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Mark112
Posts: 210
Joined: Mon Feb 16, 2015 5:25 pm

Re: Under powered s410

Sun Jul 19, 2015 7:26 am

Hairybiker59 wrote:
Blackbaronfish wrote:When did you last clean the hammer rail?

BBF

What does cleaning the hammer rail actually achieve?

Hi,

The hammer should slide on the rail like ice on polished Teflon. If it gets dirty then it tends to drag and power and consistency are lost. They are best run either dry (the hammer has self lubricating bearings) or with the merest hint if a film of very light oil a single molecule thick :) . I polished mine to a mirror finish and run mine dry and shot to shot consistency is excellent.

Mark
S410C .177 Regged - MTC Viper 4-16 x 50
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S410K .22 - Hawke Sport HD 3-9 x 50 AO IR
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simonsays
Posts: 11
Joined: Tue May 12, 2015 8:54 pm

Re: Under powered s410

Fri Jul 24, 2015 7:59 pm

Just been through all this with mine. If hammer rail doesn't do it, check the hammer spring and firing pot setting (measure screwed in to 57mm).

If you take the firing valve out, check the sealing face is not stepped.

I did all the above and it transformed the gun from 7ftlbs to 11+

Good luck.

Named rail on mine attracts grime very quickly indeed.
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granville
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Re: Under powered s410

Sat Jul 25, 2015 10:33 pm

hammer rail would be my first try.
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rhogg4696
Posts: 39
Joined: Sun Jul 26, 2015 1:21 pm

Re: Under powered s410

Sun Jul 26, 2015 1:31 pm

This a small seal S427 that can get sucked in and blown out. Happened to me. The rifle was about nine years old at the time.

Easy to fix. If this has happened then it would be time to replace all the seals and springs. Easy and cheap to do these days.

Rob.
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simonsays
Posts: 11
Joined: Tue May 12, 2015 8:54 pm

Re: Under powered s410

Sun Jul 26, 2015 5:11 pm

granville wrote:hammer rail would be my first try.


Yep
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32:1
Posts: 84
Joined: Sun Jul 26, 2015 6:08 pm

Re: Under powered s410

Sun Jul 26, 2015 7:50 pm

Would a probe seal give that effect ?
If it aint broke, fix it till it is
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