GGaskill said:One of the serious shortcomings of the Congreve rockets was deterioration of the propellant during storage and transportation. They were loaded upon manufacture so the powder had to endure all the slings and arrows of storage and deployment which fractured the charges and caused erratic results.
2 oz is a LOT of powder. A friend has 4130 tube from which he fires full and half beer cans (filled with concrete) with 200 to 400 grains and they go some 400 meters. About 1/4" wall thickness.Third_Rail said:For a 2.5" bore out of 4130 DOM, do you think that .250 walls would be safe? Keep in mind I'd be firing hardly two ounces, as this will be either cast zinc or machined aluminum.
If I need to, I'll simply machine a sleeve out of some thicker tube to reinforce as well.
I must still have been thinking about depleted uranium!Third_Rail said::lol:
You misunderstand, the projectile itself will be 2oz or thereabouts! mostly much reduced diameter with two driving bands, as it were. I'm thinking less than 100 grain charges.