Hi Folks,
This is my first post here, I hope I put it in the right place and so on.

Last fall I bought a W.J. Jeffery double rifle from a friend that had owned it for a very long time. I do not have a lot of information on the rifle and I would like to find out more including appropriate loads and so on.
It is a boxlock, hammerless rifle with a top opener and extractors. The bores and chambers look nearly mint, they are 25" long, shiny and the rifling is deep with no marks or pits. The exterior appears to have been refinished at some point. There is one standing leaf sight with two folders marked 100 and 150.
I have not been able to find out much about, I have been told it was made or left Jeffery in March of 1898. That is about it. Marked on the bottom of the block is .577 Ex. It then says .577 Magnum 3 1/4" case, 650 grain bullet, 6 1/2 Drams #6 Powder.
On top of the barrels is the W.J Jeffery address of 13 King Street St. James London.
The lockup is very tight and solid. The feel and sound when it closes is beautiful.
I have been working up loads a bit but I have not shot it much yet.
Any information would be greatly appreciated.