The art and joy of precision field target and airgun shooting. Photos, tech spec, reports.
"Airgunning" is the oldest Field Target website in Portugal. Online since 16-02-1999, created and updated by P. Mateus . Copyrights apply.
To find out the energy of a rifle (pellet and speed)
fps x fps x grains / 450240 = ft/lbs
To convert ft/lbs to
Joules
ft/lbs x 1.355817 = Joules
To convert Joules to
ft.bs
Joules x 0.737562149 = ft.lbs
1 grain = 0.06479891 grams = 0.002285714 oz (ounces)
1 Kilogram = 2.2046 lbs (pounds)
1 inch = 2.54 centimetres
.177 calibre is 4.5mm
.20 calibre is 5.05mm
.22 calibre is 5.5mm
.25 calibre is 6.35mm
Copyright, from the author or others apply to all media published. Website developed and maintaned by Pedro Mateus (Portugal).
Online since 16-02-1999 12:34:31. Last updated on 28-10-2007 17:22:58 . Top logo by João Ferro Tique . Original photo from Lasse and Ewoodi .