shotgun sam Posted August 22, 2013 Report Share Posted August 22, 2013 I have just bought a Lanber 12 bore over and under with the barrel symbols 1200Kp/cm2 does anyone know how this relates to the old ton pressure rating Link to comment Share on other sites More sharing options...
Simon J Posted August 26, 2013 Report Share Posted August 26, 2013 as I recall broadly equivalent of the UK 4 ton proof for 3 inch magnums in 12 bore with a 1 5/8 ounce load of lead shot. Remember you have to check chamber length 75 or 76 mm = 3 inches, 70 mm is 2 3/4 inches. Your Lanber being Spanish will have one or the other probably. Check out CIP if you want to have certainty Link to comment Share on other sites More sharing options...
henryo Posted August 27, 2013 Report Share Posted August 27, 2013 1200 Kp/cm2 is 1177 bars 17068 psi if that helps Link to comment Share on other sites More sharing options...
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