i like the 350 grain Hornady FPB bullet had have killed several large hogs with it. My Encore makes 2.5-3.0" groups at 100 meters using the FPB and 120 grains of 2F Pinnacle powder.
There is a knack to loading the FPB bullets. They load much easier in a rifle with a QLA or Bullet Guiding Muzzle.
Center the FPB bullet in the muzzle of the gun making sure its not canted. Give the short starter a hard slap with the heel of the hand: This will get the bullet seated into the rifling. It will now load much easier.