You might try asking over on the britishforum where there is a lot more activity and knowledge regarding the nepal guns. The thing to consider is that they are hand made and the metal can be questionable. I have one of the snider type nepal guns and just haven't had the time to try and make up some ammo for it. The action and bore on mine are in great shape. After about 10 minutes of cleaning the bore on mine was so shiny it is hard to look down it with a light at the breach end.