I used to own one and contacted a well known ithaca smith, I believe the name was les diamond. He told me that my 51 with full choke would shoot steel no prob. But may not pattern to well. I suggest you google les diamond gunsmith, he knows everything there is to know about Ithaca. And the current ithaca does not have info on the featherlite. When the company was sold years ago. The featherlite line was scrapped . I already tried them.