My Encore 12' 45/70 is a puppy dog to shot with factory (trap door) loads. From there it's up to your tolerance how hot you want to load it. Just watch out for your fingers on the trigger guard. I have load up into Ruger Number 1 load range and that was ok, but not something you want to shot all day. I have not loaded any full power Number 1 loads and dont really feel there is much need for me to do so. Although I may need to shot a deer through a 6" tree someday, so maybe.... lol
Oh by the way this barrel is Mag-Na-Ported.