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Justy2020

Air arms pressure gauge

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Hi I'm using h&n field trophy. They are 14.66 grain so did your calculations using the fps which was 552. So its sitting at just below 10ft/lb 

Just noticed that the chrono is showing an error on the rear sensor so gonna get a replacement in case it's not working right.

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3 hours ago, Ultrastu said:

Thats nice .

How do you know it was11.5 fpe when new  ?

hello, the RFD checked the 410 on purchase

6 minutes ago, Justy2020 said:

Hi I'm using h&n field trophy. They are 14.66 grain so did your calculations using the fps which was 552. So its sitting at just below 10ft/lb 

Just noticed that the chrono is showing an error on the rear sensor so gonna get a replacement in case it's not working right.

hello, best pellet i found was AA fields

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hello, i am now using a MK 1 FX verminator in 22 and still using AA fields, i bought a KRAL NP 02 in 177 but still not found a decent pellet for that one,

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2 hours ago, oldypigeonpopper said:

hello, the RFD checked the 410 on purchase

hello, best pellet i found was AA fields

I dont want  to be too pedantic .

But all rfds say "yeah we checked it , its doing 11.5 foot pounds " 

So you feel happy and buy it .

Honest truth is most (see vast majority ) dont check a new gun or even second hand ones for muzzle energy .

And even if they did .

At what pressure in the air tube did they check .250 bar .? 200 ? 150 100  75 ? 

They will all give different muzzle energies even with a reg .

And with which pellet . .all the different types will give different energies at all those different pressures .no wonder rfds dont bother to check .and just .say to a customer ."yeah its doing 11.5 fpe ." 

Get a chrono .and check your self .

Like justy 2020 has .

Well done  

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1 hour ago, Ultrastu said:

I dont want  to be too pedantic .

But all rfds say "yeah we checked it , its doing 11.5 foot pounds " 

So you feel happy and buy it .

Honest truth is most (see vast majority ) dont check a new gun or even second hand ones for muzzle energy .

And even if they did .

At what pressure in the air tube did they check .250 bar .? 200 ? 150 100  75 ? 

They will all give different muzzle energies even with a reg .

And with which pellet . .all the different types will give different energies at all those different pressures .no wonder rfds dont bother to check .and just .say to a customer ."yeah its doing 11.5 fpe ." 

Get a chrono .and check your self .

Like justy 2020 has .

Well done  

hello, well as i was there watching the 410 on the chrono i had no need to worry, it never faulted in the 5 years i used it and shot 100s of rats,  

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Thank you everyone for your help. Especially the way to calculate the ft/lb from speed using chrono.. 

Appreciate it. Many thanks.

May you all be safe while out hunting and have fun.

 

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