10 yards on a snub J-frame is not easy. It takes a lot of practice. But it's totally impractical if you ask me. You are never going to shoot someone with that gun at that range.
The J-frame has the nickname the belly gun. If you use it, you'll be shooting someone at very close quarters, often without looking down the sights. Train on a snub J-frame at 3 yards. Yes, three yards. Don't let your ego get the best of you. When you can put them all in a one-inch group at 9 feet, only then should you move the target back.
I would rather master putting all five rounds in a one-foot group at 6 feet from the hip than I would getting small groups at 10 yards. The second can be done and will make you a better shooter all around, but outside of the range is a mostly unneeded skillset.