Help with this bullet

[mreffex]

http://community.webshots.com/album/582121448GsUwIu?vhost=community

please help with this problem, the neck of the cartridge stretched when i shot it, why.

1868 Remington Rolling Block 43 eqyptian.

[waksupi]

That is not the right cartridge for the rifle. The neck didn't stretch, aside from filling your chamber, and blowing the case out to the proper fit. Assuming the head diameter is correct, you can blow out the rest of your cases to match the rifle. Then you need to go to cartridges of the world, and figure out exactly what you are really shooting. Once you find that, you will then need to find the correct loading dies, and bullet size.

Bet the accuracy really sucked, huh?

Welcome aboard, and be careful. That is how people blow up guns.

[Lead pot]

Almost like using a .308 in a 06 chamber.
When you start fooling with the old 11 mm rollers take a chamber cast first to actually see what you have using a cross reference like Cartridges of the World or do a google.
One thing what you have now with the empty case take measurements and see what you can find.
Yes cerrosafe is a little high priced but you can use it over and over again with just a hot air blower to melt it, but it might save your rifle or your self.

Lp.

[Don McDowell]

Is your gun Eyptian marked? I'm going to guess you're just getting the cases fireformed. You're fired cases look alot like the ones I get out of my 43 egyptian rifle. So long as your not splitting any cases length wise or seeing any bright rings around the body of the case you're probably good to go.
I also have a similar situation going on with my new 44-77 AND fireforming cases.
http://i51.photobucket.com/albums/f358/Ranch137/002.jpg