I took my new scope out for the first time yesterday to shoot at distance. I was out around 280 yards or so and getting my hits on a 8x11" sized target. No angle, no wind... pretty straight forward shot. I felt good as this was my first outing engaging at anything so far away. What size targets should I expect at the major 3-gun matches for rifle? I've seen the flashers and a lot of videos online but never much mention of target size.