Looking to try my compact with with NSA .217 slugs for a slugs only tuned gun. I have 17, 20, and 23 grain slugs to try. I also have a Huma bottle reg on to help ease thebwork of the prophet reg. Huma is set at 140 bar and the RTI is 120 bar. From shooting in the basement I have the 17s shooting 905 fps with a little more room to 915-920 with hammer spring adjustment. Going to the range for distance testing to see how this will work out. Anyone else tried to tune for slugs in the compact?