Greener Harpoon Gun

[336paulm]

If any of you commercial fishermen own a Greener Harpoon Gun I am looking for some info. on what powder charge to load the blanks with or where I can buy some blanks at.

[nautiduck]

Hey 336 if you look at that pic I posted about the blanks it shows the amount of powder in grains. I believe its 14 but it might be 17 I dont remember. Its on the cover at an angle but you can make it out.

[336paulm]

That pic you posted is the box of shells I purchased with the gun ,they are so old I haven't even tried to shoot them yet.I know it is forteen grains but what I am trying to find out is what type of powder I should use to load some new blanks.Mr. Greener told me that their ols blanks were loaded with Cordite which has not been used since WWII.But I would like to thank you for your interest and help! I just thought some Bluefin or Shark fisherman may have a Harpoon gun that has been loading some new blanks that may be able to give me the type powder and amount.

Thanks Again

[336paulm]

That pic you posted is the box of shells I purchased with the gun ,they are so old I haven't even tried to shoot them yet.I know it is forteen grains but what I am trying to find out is what type of powder I should use to load some new blanks.Mr. Greener told me that their old blanks were loaded with Cordite which has not been used since WWII.But I would like to thank you for your interest and help! I just thought some Bluefin or Shark fisherman may have a Harpoon gun that he has been loading some new blanks for,and that he may be able to give me the type powder and amount.

Thanks Again
Paul

[336paulm]

ooops THATS WHAT HAPPENS WHEN YOU HAVE A HAIR TRIGGER MOUSE !

[Flatdog]

If it helps cordite was generally in stick form looks like un- cooked spaghetti it is slow burning so any modern slow burning powder should work IMR 4330 comes to mind from when I loaded .458 rounds might be wrong on that but go with a real slow burn. Also have you tried contacting a movie or stage props company they make .303 blanks to be fired from a 12ga, using inserts may be the right thing for you, trying to get the crimp right on that brass can be a *******, also if they will make rounds for you you could also tell them the amount of oooooooooooppppppphhhhhhhh you want.