I think that there is notion among some shooters of Civil War muzzle loading rifled arms is that if you're not getting "good accuracy" with a "five seventy something" minie and the service load(or more) of powder(not always real black) then it's a round ball gun. They may not have an interest in the arm and the period it comes from as opposed to a desire for a big bore gun that's "easy to load and shoot". Rather than doing some homework, the common question is "what's the max load my gun can take?" They come to find out that there is more of an investment in time and money to get the best out of a quality repro or an original Civil War arm in good condition than with most rifles intended for patched balls. For those of us who are serious about shooting them, that's part of the fun. Now, I want to make it clear that I have no problem with someone who wants to shoot PRBs out of a '63 Springfield. Have at it. I do have a problem with pronouncing it inaccurate with the proper ammunition intended for it.