Please I need a file o web page in Internet with loading data with modern powders, cartriges dimensions,pressures and velocities for a 500 Nitro Express. Thanks to all

Caribu,

Graeme Wright's Book, Shooting the British Double Rifle has most of the above.
Any old ammunition catalogue will also have them - ELEY, ICI etc etc

Cartridge dimensions - suggest John Donneley's Book - The Handloaders Manual of Cartridge Conversions
(however I do not know how technically exact he is on Cartridge dimensions).

I can't provide load data as you have slightly different powders over there - made in Australia
but called another name in the US.

Hope this Helps

500 Nitro

Recommend you purchase the loading manual "Any Shot You Want" by Art Alphin.

When you say 500 nitro, I am assuming that you mean the cordite loading and NOT the black powder round.
If you are using the Cordite round try this:

Multiply the cordite charge in grains x 1.19. The number you arrive at will give you the load in grains for RELOADER 15 Powder. Notice THAT I SAID RELOADER 15 POWDER---- DO NOT USE ANY OTHER POWDER AS A SUBSTITUTE!!!!

The cordite load is 80 grains behind a 570 grain bullet. This equates to 95.2 grains of Reloader 15. I have found this to be a factory duplication load in several of the old British doubles. In the event that the powder does not occupy at least 75% of the case, buy some black foam and a punch that is a little larger than your bullet diameter, (.510) punch out some foam wads and gently press a piece of the foam wad into the case until it rests on top of your powder. You don't have to press it hard upon the powder just firmly in place so tyhe charge stays in the rear of the case near the primer.

This should give you a very close duplication of the original Kynoch loading. You should have a chronograph to see exactly where you are in regards to muzzle velocity.

Your velocity should be 2150 fps for the 3 inch case and and 2125 if you have the 3 1/4" case.

I would stay away from Art Alpin and his book. What ever you do do not use any monolithic solids in your rifle!

I forgot the technical data. The 3 inch case should be trimmed to 2.90 inches. The pressure on the 3 inch case is 16 tons and the 3 1/4" is 15.5 tons. If you are using cases with the old Berdan primers, you will need to get a Berdan decapper from RCBS or have one made as I did. The RCBS device is a little cumbersome to use and will scratch the case and on occasion will break off a piece of the rim. I had one made at a local machine shop and it is simply a piece of cold rolled steel that was turned down to about .020 smaller than the inside diameter of the case mouth. The business end has two small pins inserted into the end of the rod and secured by set screws on each side of the shaft. The pins are made of piano wire and are approximately .028 in diameter. Now, the trick is to have the pins inserted into the end of the shaft to correspond to the exact placement of the two, yes I said two flash holes in the Berdan case. If you give the machinist a case with the primer removed, he will make your decapping tool so that the pins fall right into the flash holes of your cases. When you want to deprime your fired cases, you drop the little tool into the case, gently turn it around until you feel the pins drop into the flash holes. Set the case on the edge of your loading bench, give the top of the tool a firm tap with a brass hammer, and out pops the primer!
let me know if you have any questions.

Hola Caribu,

do you have access to Norma or Kemira Powders? I use to load 112 Norma 204 behind 570 Woodl. FMJ, or a duplex load of Kemira 150 or 160 with N165 behind the same bullet. It works good.

Saludos

Pantanal