Good for you!!!!! I'd be grinnin' like a possum eatin'.....well...you know. Once you ascertain the actual cartridge there's more than a few on here who can help you with loads and development. As Mike has often pointed out to me, it doesn't matter what it's chambered to, brass can be formed/made from something and you can call it what you want. Bullet molds are available from several sources and can be made in the proper weight and diameter. With 2 fired cases Dave at CH-4D can make proper loading dies without breaking the bank. If it is indeed the 9.3 X 74R data and components abound. When you make a new chamber cast add a couple inches and you will pick up the bore also.
I assume Raimey wanted to see the muzzles for any possible damage or excessive wear.
As far as maintenance, pretty much like any other firearm. The only difference would be to keep the hinge pin lightly greased but that holds true on any break action firearm. Recently I cleaned and lightly greased the hinge pins on all my break action firearms. One or two benefitted greatly, others you couldn't tell the difference...but it's been done, is better and I feel better about having done it.
GOOD ON YOU!!! Congratulations and forgive me for a bit of envy...
