There no substitute for trigger time and practice. If you get a scope skip the Bushnell/BSA and Leupold and get yourself a Sightron S1 (if you can afford it get the S11 or S11 Big Sky) as you can see they are rated pretty high and they are all made in Japan (not China, the Philippines or Korea). For the money the S1 is a great scope and rated up to 50bmg recoil. Go to the bottom of the page for the under $300 scope ratings. IMO Zeiss Conquest and Sightron S1, S11 and S11 Big Sky are the best value for money scopes on the market.
http://4scopes.com/customer_scope_guide.htm
Good Luck
Edit:
http://4scopes.com/sightron_SI_index.htm
http://www.sightron.com/index.php?action=view_document&did=1280519613
http://4scopes.com/customer_scope_guide.htm
Good Luck
Edit:
http://4scopes.com/sightron_SI_index.htm
http://www.sightron.com/index.php?action=view_document&did=1280519613