25 yard zero, 26- 30 yds PA high mounts, 9.5 mag on my Sr-6 as it means I can shoot 35yd & 40yds 25mm targets using pretty much half a dot, 35 is just above & 40 just below. I tried a 35yd zero & couldn't get on with it.
45 = 1 dot (or just below with certain batches of pellets)
40 = just below half dot
35 = just above
30 = pretty much inside top of kill
25/20 = on
15 = half dot
13 = 1 dot
10 = 1 & a half
8 = 2 & a half
I have shot this for years & get on OK with it.
In life you should not persue goals that are easily achieved, develop an instinct for what can be only just achieved through your greatest efforts.