I broke my 15-22 in with Win 555 Ammo, and haven't had any problems. I used to shoot Remmy Ammo years ago... and it jammed in everything I put it in. I now use, Win, Fed & CCI.
Take the Remmy Ammo you have left over, and see if some Single-Shot Rifle or Revolver Shooters, may trade you something Shootable for it. Worth a try!
Best of Luck!
"The Floggings will continue, until Morale improves!"