You might try a .22 conversion unit for a while. If your practice scores are a lot better, then the problem is flinching, due to reaction to the blast and recoil of the centerfire ammo. You can "swiss load" for the auto, by loading your mags with your eyes shut, mixing in some dummy rds and noticing when you jerk (on the dud rds). Or you can use a revolver for a while, and use 1-2 empty cases in the cylinder. You can use very light reloads for a while, or you can go the other route, and use really hot stuff, and get used to excessive blast and recoil, then your match loads will seem "tame" by comparison. Also, many people can avoid flinching, but only in slow fire. Make them deliver the sort of speed repeat hits necessary in this sport, and they come apart. Taking 1-2 full seconds per shot is nothing. Getting repeat hits on the A zone, at 10 yds, in .16 second or less, that takes a lot of work, especially if doing so without the help of a compensator or red dot sight, and with full power loads.