If you lung shoot them i would also look at the 139 gr sst. It will act more like a varmit bullet at closer ranges 20-100 yds. I have been pleased with there accuracy and performance.
It really depends on the quality of the bore sight. I have personally used multiple types of bore sights and the only one I use is the one you insert into the chamber. I have had a lot better luck and a lot less headaches.