It's odd, I was the same way. I can hit dimes at 10-20 yards all day long with a scope and rested. But that's exactly why I made this a "NO REST" competition, takes a whole lot more skill to level a good shot without a rest. Not saying that using a rest requires no skill because it does, but without a rest requires the use of muscles and focus that you never think of when using a rest. I find that sitting, with my knees pulled up tight to my chest, my left elbow in tight to my body, and my left hand loosely cradling, or "taco holding" the forend works best for me. Of course I also said that you could lay prone, which is also a nice way to shoot if you have good level ground between you and the target. I'm working overtime at work all week, and working saturday, so I haven't been able to try any shooting...I swear I'll get some targets up in the yard on sunday, even if I have to lock all the kids in their rooms:)
Dan