imo mechanical isnt an option..
i have never had bh fly like field tips.
i dont even shoot field tips anymore, its all magnus snuffers fer me....you can resharpen and use them for over 5 years..just my experience..i never bought a 2nd pack of em, cause i dont need too...
when i shot mech..i had to buy new ones every year, if not twice a year, and fer $35 i get 6 of em, 3 ta practice and 3 to hunt-- basically how i do it.
if i was you, i'd get a paper tune fer sure and just shoot the bh's.
gl