chairgun will give you a rough indication if you enter details about scope height, pellets fps etc correctly.
it seems to get the flat trajectory at the more common Ft ranges of 40 + yards, you will need a scope quite high above the barrel.
take a look at BFTA Chamopion mniel daniels set up. his Leip Comp is high above the Walthers barrel.
the disadvanatge is on the fewer shots below 40 you may go more than a full turn out on dialing?
Experiment with your set up and make note of results, see what suits you best?
what are your weak points etc?
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