Understand......I do remember Ithaca selling the patent, etc, to Remington some time ago.
So, are the Ithaca 10 ga auto's not reliable ?
I've got both and I've never had a jam with either one. I got the Ithaca back when we could still use lead for waterfowl. The Ithaca's safety sticks out a little farther and the detent spring is not as strong as on the Remington, so I'm continually checking it.
The SP10s have screw-in chokes, my Mag10 is fixed full.
