I have achieved. Here is a 1.46 group at 150yds. M3 700mm .22 Std barrel, slug port, Brass hammer, 150/125 regs, 16 mac, 4.75 mic, -1/4 turn from max valve, 935 fps, H&N HP@ .217 30gr. Pic 2 is just for fun, As suggested from another member, shooting flys:p, I got one at 50.(upper hole)