[kciH]

I haven't played with an Omega, but I do own a Black Diamond. What loads are you using? Do you have a scope on it? When I worked up loads for mine with a scope it would shoot 1 1/2" 3-shot groups. If you're looking for more accuracy, you probably don't need to look beyond your Black Diamond. I've even found that it will shoot round ball pretty well if you back the powder charge down to 60-70grs, contrary to what TC told me.