The Blackhorn can be a little finicky with ignition, but doesn't leave a crud ring and is very easy to clean. It shoots very consistent velocities and is very consistent on size and weight. Where as other powders can be different sizes from the start of the jug to the bottom, BH209 is very consistent. Make sure your particular gun can shoot it though. I know plunger style guns aren't suppose to use it. As far as how much to use. I wold start at 90, shoot a couple groups, then try 100, shoot a couple, 110, shoot a couple and 120, shoot a couple. When you see which is showing the most promising results you can fine tune from there. If you don't like what you are getting you could then try a different bullet weight/type. Since you won't be using a scope I would shoot these groups at a distance that you feel takes the most human error out of the equation, but still far enough to let the different powder charges/bullet types show their differences. Maybe like 75 yds. with a good rest. Last of all, don't get discouraged, this process might take multiple trips to the range. Good luck!!