Justy2020 Posted November 30, 2019 Author Report Share Posted November 30, 2019 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. Quote Link to comment Share on other sites More sharing options...
oldypigeonpopper Posted November 30, 2019 Report Share Posted November 30, 2019 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 Quote Link to comment Share on other sites More sharing options...
oldypigeonpopper Posted November 30, 2019 Report Share Posted November 30, 2019 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, Quote Link to comment Share on other sites More sharing options...
Ultrastu Posted November 30, 2019 Report Share Posted November 30, 2019 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 Quote Link to comment Share on other sites More sharing options...
oldypigeonpopper Posted November 30, 2019 Report Share Posted November 30, 2019 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, Quote Link to comment Share on other sites More sharing options...
Justy2020 Posted December 4, 2019 Author Report Share Posted December 4, 2019 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. Quote Link to comment Share on other sites More sharing options...
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