you need to replace it. You may also be able to get away with making it a SCSA gun and only shoot minor out of it. I would only recommend that if the gun has been looked over by a competent gun smith. Otherwise its trash
I think AA#7 is a good choice if you can find it. However it leaves a ton of unburnt powder (gravel).
I load 3n38 in 9 MaJor with very little issues. A little spilling here and there but fine otherwise
Blue bullets are the best coated bullets out there. Beware of Hitech coated bullets. They all smoke. Blue bullets uses a proprietary coating that smoke very little even in 9Major