I own a Genesis with a stainless steel barrel. And it is a good shooter. I hate to ever tell someone to get pellets because I always feel I can do the same with loose powder. But the best group I ever shot in my life was with my Genesis and 2 pyrodex RS pellets
This picture was me trying black powder in the rifle. It did well.
This was me trying some all solid lead Keith Nose bullets. These also shot great. I do have a Nikon Omega scope on the rifle. I was shooting off a rest. And was swabbing between each shot.
My Genesis is a very good rifle. But when you clean it and you take the barrel off the receiver, be sure to pay attention to the inside of the receiver lock up area of the barrel. Take some Q tips and scrub all the square corners.