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					Originally Posted by Ed
					
				 Hey ... why not get some liquid latex and make a casting of the inside?
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  That, would be an interesting 'experiment' ...I remember reading somewhere that some had a larger diameter chamber where the charge was situated ....this was to allow the explosive gasses to expand more rapidly which imparted a greater kinetic force to the projectile. It would make sense to me that minature 'mock-ups' would be used to test modifications .... 

 I assume that the bore would be coated rather than filled (producing a 'plug') ...so that the hardened latex is easier to remove.
 Fernando, as you already know I have always seen your cannon as a weapon ...it certainly looks the part fixed to the stock  

 ...but there again ...some 'weapons' I have bought turned out to be gardening implements  
 
  
 ...so what do I know  
 
 
 Kind Regards David