Yes, I had the original Contender chambered in it sent to me by JD Jones with the order to "see what it does".
I took around 10 groundhogs. Everyone got to its hole. I took around a dozen deer with it. They ran from 50 to 150 yards. All these animals were taken with the original Rem. open point bullet. It was garbage.
Several govt. agencies tried it with this bullet and they all got rid of it quickly. JD made other guns for these agencies. I did deer with them and they did well- different cal., different bullet.
It looks like newer bullets in this round makes it more effective, but I was so burned with it that I never used it again. JD, too.