Cartridges that are loaded with cordite?

[turtlezx]

carcanos also use cordite

[Moleman-]

Neat old video of 303 production including cordite being inserted. https://www.youtube.com/watch?v=wXNXUpOozDg

[Outpost75]

If the harpoon weighs as much as a pound, I would use a slow-burning rifle powder similar to 4895, RL15 or Varget. A fast-burning pistol or shotgun powder is going to blow the gun up with such a heavy projectile. A .30 M1 carbine grenade launching blank used a compressed charge of 4895.

[uscra112]

I'm wondering what they planned to harpoon with a 1-pound dart. Not whales, that's for sure. Crocodiles?

[Geezer in NH]

From articles in Handloaders Digest and others IMR 3031 was used as replacement of cordite. Cordite was strands in rifles but chopped up in handguns.

[15meter]

Is this a line launching gun?

Photos would be cool.

And you might try contacting a place like Mystic Seaport in Connecticut, they might be able to point you in the right direction on it's origin and see if they fire any of their harpoons.

[ETG]

I have to ask if that was the gun used in Jaws???? very cool

Not this specific gun but yes, this was the gun used in Jaws.

[ETG]

If the harpoon weighs as much as a pound, I would use a slow-burning rifle powder similar to 4895, RL15 or Varget. A fast-burning pistol or shotgun powder is going to blow the gun up with such a heavy projectile. A .30 M1 carbine grenade launching blank used a compressed charge of 4895.

That may be a good starting point. .30 carbine to launch a grenade and a 38 special to launch a harpoon. The bore narrows to about .25 after the cartridge chamber. I have a bunch of 4895. I wouldn't think a trial without a harpoon would blow the gun up. A carbine barrel is about the same diameter as where the harpoon slides on.

[indian joe]

[QUOTE=uscra112;5475839]Ignore that post about Red Dot. Fast powders produce high pressures when pushing a heavy load.


Double that! Red dot can turn really nasty really fast under heavy projectile

[15meter]

Do a web search for Ross Seyfried and Reloder 15 to Cordite.

99% sure it's cordite load times 1.19. It works like a charm on the big bores, with the recommendations to use a mid-range rifle powder it sounds like a place to start.

If I remember correctly, Seyfried had a quote along the lines of "cordite substitute powders start and end with RL-15", or words to that effect.

[BadgerShooter]

Pulled down a Kynoch 577-450 round and it was loaded with 45 grains of Cordite. The Red and Yellow boxes were cordite loaded, the blue and red boxes were loaded with black powder.