I am guessing Benchrest?

I think you will struggle with your budget. You might be better getting something second hand.
Reticle is EVERYTHING. Hawke mil dot is very thick and can cover the x completely. I recently fitted a Sightron S-II 36x44 to my Brno about £400 if you shop around they sometimes turn up as people upgrade.
I have a Hawke Airmax30 AMX really quite fine glass as well.

I once was told "Only a rich man can afford cheap glass"

Hope this helps