A friend just was given a OU Geyger in 8 x 57 JR and 16 ga..  He wants me to clean it.  It is engraved, I don't know what the material is for sure.  What should be used for this?  It has been used, has no case.  The last time it was used was for antelop[e in the 70's according to Joe.  He has one cartridge.  The 2 sources I thought of here in Denver didn't have any of the rimmed J's.  One didn't even know what they were.  Who may have ammo?  Joe doen't reload, I do, but we have to be reasonable about how much he wants to spend.  I am just glad to have the chance to handle this thing.  I have already found reference to RWS, and S& B making it.   Now if we can find some and afford it (Joe is a retiree).  Anyone know of a source of .318 bullets if we go that route?
Thanks in advance,  Kenny