I was checking the zero on my Tikka T3 before a day's hind stalking on Forrest Estate (great place !) back in February. Two aimed shots had hit the target to John Hilditch's satisfaction, but as there was a third round in the magazine I decided to fire it just to prove the first shots weren't a fluke. The second spent case ejected OK, but when I chambered the third round it went off, hitting the ground about 4 feet below the target. My hand was still on the bolt handle (not the trigger) as the rifle fired. I was using .308 factory loads, and the action has worked perfectly ever since. Any suggestions ? The experience was a forceful lesson in muzzle awareness !