How easy is reloading in cased gauntlets ?
Not hard at all. Again, if you can make a fist you're golden. Put foot in stirrup, make a fist around the string, pull back until it locks behind the trigger, then put the bolt on and you're good.
x-bows weren't hard to use at all, hell you could have hooks for hands and still use and reload them find (except the winched ones, but still make a fist and use the crank handles).