From: Jonathan Spencer, [EMAIL PROTECTED] >If my memory serves me correctly the ADI plant in Mulwala, Australia, holds >several patents for producing powders with micropores through the grains. >Thus, the said grains burn from the inside-out as well as outside in,, >which results in a far more constant surface area of the grain throughout >its combustion. No it doesn't, it results in *increasing* surface area and *increasing* rate of combustion. The Vihtavouri loading manual explains this sort of 'progressive' powder quite well. >Results in a flatter pressure curve. Agreed. This is because the increasing rate of combustion (and hence increasing rate of expansion) occurs as the volume available to the expanding gases increases (because the bullet is moving down the bore). --Jonathan Spencer, firearms examiner "Democracy is two wolves and a lamb voting on what to have for lunch. Liberty is a well armed lamb contesting the vote." Benjamin Franklin, 1759 [EMAIL PROTECTED] (preferred) [EMAIL PROTECTED] ================================================================== Keith Borer Consultants, Mountjoy Research Centre, Durham, DH1 3UR, England tel: + 44 191 386 6107 fax: + 44 191 383 0686 visit our web site at http://www.borer.demon.co.uk Lat. 54 34.24 N Long. 1 20.17 W ================================================================== -------[Cybershooters contacts]-------- Editor: [EMAIL PROTECTED] Website & subscription info: www.cybershooters.org
