I am some what new to reloading. On my MEC 410 progressive reloader, it drops 12.6 - 12.9 of Lil' Gun when the bushing chart shows it should drop 13.4 grains using the #10 bushing. The #11 bushing drops 13.7 - 13.9. The recipe I am using calls for 13.4, does MEC offer bushings in half sizes or should I midfy the #10 bushing? What have others done who have experienced this.