Congratulations. I shoot my B,C, and F grade Remingtons three times a week at my local club. There's really no good reason you shouldn't be able to shoot your 10ga - shot doesn't go any faster or farther. My reloads for my 1882 Remington hammer gun are only 1oz. If you need any data for the 10, go to the Parker web site. I just use mild 12ga loads, they'll be less pressure than the 12. Maybe you could find some Gauge Mates 10 to 12. Good luck.