I'm posting this on behalf of a new member "Christopher" who was unable to post it himself.

From Christopher

Hello,

I will try to post some pictures of my DR Army and Navy .450.
Can you send it to the forum as I can't find the way to do this.
I would be pleased if somebody can give me some informations about this gun: manufacturing year, nitro or BP etc...
I tried factory load (A Square .450 NE sold with the gun)that where ok except sign of execive pressure.
I am still trying to find a good load but find it pretty hard: velocitie seems to be too low (around 1900 fps) and I have some bullets keyholing (480 woodleigh or hornady).

Anybody can help me?

The rifle twist seem rather long, about 1/20.

Thanks to everybody for help.

Chris.