If this is an original CVA mountain rifle , then it was made for the most part in the US . Later models are Spanish made starting early on Jukar and then Adesa.
The later guns also will be metric to include the neck of the nipple

Either way I don�t believe it will mater if your using T7 or Pyro . The reason is that your running into an issue of ignition temperatures, as brick top mentioned .
Combined with a flash channel design that�s long and takes 2, 90 deg turns.

Through the years CVA used 3 different bolsters . Their very early drum bolsters were short necked bolsters . By the late 1970�s they went to a medium neck and then a long necked bolster .
What also changed was the flash hole exited from the booster to the main charge .
For some reason some of these long necked bolsters only contain a small slit for the flash to go through . While others have a larger flash channel size hole . Either way your flash is traveling right around � of an inch before it reaches the main charge.

Put the modern powders aside and get you some BP .

Last edited by captchee; 11/15/12.

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