I took my air arms s400 177 out to day for a hunt.As i step a foot on my shoot i saw a squirrel on a fence post about 60 yards in front of me i new my range and how many mildot's i needed to use so i slowley opened my slip and pull the rifle out.Then i got on the floor pulled the bi-pod out aimed and WACK perfected headshot.then i sat there for a few more seconds as i have saw some pigeon's in a tree to my right about 56 yards.So again took aim Wack down it fluffed headshot.So i new this would be the right place to stay for a few hours so what i did was get the pigeon make a rod and stuck t