After 17 year hiatus from bow hunting I came back last year and started shooting again. I shoot two to three times a week and after almost a year I am sort of frustrated with my ability. At 30 yrds I can put 6 out of ten arrows in a 4 in. circle but the other four very from high, low left and right. I've read books on form and really want to improve my shooting. Any input would help. I know that part of it is more practice but any insight or suggestions would be appreciated.