I shot my very first trap Sunday using my brand new Winchester Supreme Select Sporting 30" for the very first time. I did very poorly, I only got 9 out 25 birds. The gun came factory installed improved cylinder on the lower barrel and modified on the top barrel. The range master said I should use the modified choke. I didn't have the choke wrench with me so I was shooting just the top barrel with modified choke. The ammo was 2 3/4 dr. 1 oz. #8 shots. We all shot with gun pre-mounted. I got quite a bit of face slapping by the stock. Also my shoulder was hurting from the recoil the next morning. I did not remember much face slapping or shoulder hurting when I was hunting with my Remington 870 Express Super Magnum using heavier loads. Also I got 10 birds using only 12 rounds. Trap is much harder than hunting. I must have done something wrong to score so badly. Please help.