G'day Geoff
There are any number of reticle's on the market that the fly shooters use for 500m events.
I use March 8-80x with the MTR-1 reticle because it is incremental same in both windage and elevation so hold offs with wind are also calculated with elevation hold offs.
I also have a range of Night force scopes 12-42 BR series with NP-R2 and NP-2DD both have their advantages.
I guess like Dave said it is truly a personal thing, good advice at this stage would be attend a fly match and ask fellow shooters for a look through their scopes and ask them why they like the reticle they have chosen.
I really do believe that all the top brands have a place in the market for they fly it really will be up to you.
cheers Les
There is no better recognition of what reticle you are after than seeing an actual target at 500m away.
shooting well is more a mental control of your thoughts than just pulling the trigger........