hey are you talking about light loads for shooting small game in a high power rifle?

I'm not real clear on gunsmithing but that has been a favorite idea of mine for a while. Look. I don't know if this is going off the deep end or not, but let's say you wanted to carry a rifle capable of dropping a deer or dissuading a bear, but yet able to harvest squirrels and turkeys and junk (in case you are a survivalist or something.)

Could you load accurate 5.56 rounds in an AR that would fire at ~1000 fps speeds and high power loads in the same rifle through hand-loading alone?

You'd have to cycle the action yourself, right?

Would it be somehow better to carry both the AR and a .22 LR conversion kit?