Improved cylinder size 7.5's

I'm still using IC, but might switch here in a week to Mod. I have been knocking birds down at 40yds so I figure a Mod might give me 50yds. One thing to take into consideration as how you are shooting. Shooting with the wind you get much better range. Shooting perpendicular to the wind you get the average range. When you shoot into the wind you range can cut in half or less depending on the strength of the wind. I have had birds that were 25yds from me into a 20mph wind and the shot spreads so far out that you cannot hit them. I shot into a tank, into the teeth of a 20mph wind and at 30ys my pattern was 20yds wide! Therefor, I stick to perpendicular or with the wind shots.