WHAT DOES HENRY LEVER ACTION REPLACEMENT PARTS MEAN?

In the rifle size barrel you will get a pair a lot more hundred fps with much less strain for those who go along with a slower magnum pistol powder like W296/H110 or Lil'gun. Individually I want Lil'gun since it burns cleaner and is easier to seal the chamber with but use equally powders.I set the Skinner sight on and I adore it. The rifle shot 4"