The advice above is very good. Only thing I'll add is, avoid boat-tail bullets. They don't tend to seal or stabilize well with Enfield rifling and won't be very accurate. Hollow or flat base bullets always delivered the best accuracy for me. And use gas checks for lead unless they are hollow base and fairly hard (Linotype or Alloy#2). Also, your No.1 should have five-groove Enfield-type rifling, was used mostly with Cordite, which tends to erode chamber throats, and corrosive priming, and was was probably cleaned most of its life with kettle water and a pull-through barrel cord with a wire-mesh scraper loop. That combination tends to leave the bore - especially throat and muzzle - fairly bad off - after more than 100 years of service. If you were 100 years old, and had been fed a steady diet of hard-to-digest food, worked hard day-in and day-out, then had your innards scraped and boiled regularly, you'd be pretty wore out, too.
If the chamber throat is badly eroded, or if the bore is smooth and frosty from salt exposure, scraping, years of corrosion, consider using a hollow-base lead .312" pistol bullet at lower velocity (under 1000fps) and use the rifle for targets only. Alliant 2400, IMR 4227, Unique, and powders in that burn range work pretty well. So does Ed Harris' "The Load" - 13gr. Red Dot under a 150gr. lead round nose. A frosty bore won't be bothered by lead. If it's badly pitted, use .32 caliber pistol heavy weight (115gr. +) jacketed bullets, like Frogo said.
