I discovered something very interesting with my Brocock Bantam Sniper HR today, gun is more accurate if you wait a little longer between each shot. If you shoot gun say within 5 seconds or less alter taking a shot you will get flyers both high, low left and right. After cycling bolt I counted to 10 between each shot and gun groups are much tighter with JSB 16 gr Exacts and Crosman Premier 14.3.Try this once with your Huma Regulated PCP and see what happens.