RE: Shooting round balls out of TC Encore...how?
Buying a new 1-60ish twist roundball rifle that's not Spanish-made will cost you more thanmost inlines. A new T/C Renegade is around $380. The Hawkens is around $469. The Lyman Great Plains is around $400. Even the Spanish Traditions Kentuckyor shorterTennessee are around $300.
"Most" 1-48" twists will shoot higher grain roundball charges well out to around 50-75 yards. A 1-60ish twist will go to 100 yards & beyond.
That Encore barrel may not be dependable past 75 yards. They are not cheap either. Another option would be to buy a used T/C Renegade or Hawkens at an auction site like Gunbroker.com or AuctionArms.com -- then buy an new aftermarket roundball drop-in barrel for it for around $159 at trackofthewolf.com.