i zero both my big nikko and leup comp 40 at 30 yards and have no negative clicks which is what you want to avoid. i shoot JSB4.53 at 777fps and set up chairgun at 3" scope height and find the click charts a very accurate guide.
When I was 5 I wanted to be like George Best
At 10 I wanted to be Nigel Mansell
At 40 I wanted to be like Tiger Woods
At 50 I want to be like Gilly
Just shows how life can kick you in the nads