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Air Gun Home Forum Index » General Air Gun Questions and Topics » What does FPE Stand for..    View previous topic :: View next topic  What does FPE Stand for..   Posted: Wed Jan 14, 2009 3:21 pm Dussalater Member Joined: 03 Jan 2009 Posts: 21 Can someone tell me what FPE means. And if they know what benjamin 392's FP is and what is good and what is bad. Thx for looking   Posted: Wed Jan 14, 2009 4:08 pm rsterne Moderator Joined: 15 Jan 2008 Posts: 2998 Location: Coalmont, BC The formula is: FPE = W x V^2 / 450240 FPE is energy in ft. lb. W is pellet weight in grains V is velocity in ft./sec. (squared in the formula) Bob _________________ Dominion Marksman Silver Shield - 5890 x 6000 in 1976, and downhill ever since! Airsonal: Too many to count!   Posted: Wed Jan 14, 2009 5:12 pm Rogerflat Silver Status Member Joined: 03 Jan 2008 Posts: 2051 The real question is "How is FPE relevant?" The answer: It tells you how powerful your gun is. FPS on the other hand just tells you how fast it shoots the projectile. Which is meaningless in and of itself. FPE is the number that you should focus on when it comes to gauging your rifle's potency. FPS is what you focus on when it comes to consistency. _________________ I done been assisted by the trees and rivers. Never needed any minister to figure my divinity.   Posted: Wed Jan 14, 2009 5:33 pm broommaster2000 Moderator Joined: 10 Mar 2007 Posts: 5714 Location: City of Groningen, Groningen, The Netherlands And that is confirmed by this forum's officials. _________________ BIG GAP   Posted: Wed Jan 14, 2009 11:34 pm Slavia Moderator Joined: 31 Mar 2008 Posts: 4382 Location: Waseca, Minnesota, USA Quote: The formula is: FPE = W x V^2 / 450240 You can also use the calculator on the main page of this forum: http://www.airgunhome.com/pages/calculators.html _________________ ¡Listo! ¡Apunte! ¡Fuego!   Posted: Thu Jan 15, 2009 4:07 am broommaster2000 Moderator Joined: 10 Mar 2007 Posts: 5714 Location: City of Groningen, Groningen, The Netherlands Sssssh! Don't tell him yet! _________________ BIG GAP   Posted: Thu Jan 15, 2009 9:38 am Slavia Moderator Joined: 31 Mar 2008 Posts: 4382 Location: Waseca, Minnesota, USA Quote: Sssssh! Don't tell him yet! His AGH dossier indicated that he has double 0 top secret clearance, so Dussalater is O.K. By the way, Broom: Your dossier includes a Groningen police file from July 23, 2004 at 0126 GMT. Something about a pecadillo involving a Swedish flight attendant, a railroad locomotive, and a box of cornflakes. Did you ever get that resolved? Dussalater - peruse the main page at your leisure. There's a lot of good stuff there. The glossary is a good place to start: http://www.airgunhome.com/pages/glossary.html _________________ ¡Listo! ¡Apunte! ¡Fuego!   Posted: Thu Jan 15, 2009 9:57 am broommaster2000 Moderator Joined: 10 Mar 2007 Posts: 5714 Location: City of Groningen, Groningen, The Netherlands Slavia wrote: Quote: Sssssh! Don't tell him yet! By the way, Broom: Your dossier includes a Groningen police file from July 23, 2004 at 0126 GMT. Something about a pecadillo involving a Swedish flight attendant, a railroad locomotive, and a box of cornflakes. Did you ever get that resolved? She... I... The coal... The Wodka... It's all a blur... And why do I have a Tattoo saying "The Flying Dutchman" on my behind... _________________ BIG GAP   Posted: Fri Jan 23, 2009 7:52 pm sniper Silver Status Member Joined: 28 Nov 2008 Posts: 3752 Location: Star, Idaho my mac-1 392 hits 24fpe @14 pumps with kodiaks. the modified is almost twicw the power of the stock model. that's 21.1 grains around 720 fps. _________________ I believe in gun control, If there's a gun around I want to be controlling it....... 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