If you want Hawkins I would wait for the new mount that lets you add accessories to it like a send it level. I have ran Hawkins on my hunting guns for years. Awesome products.
IMO the grey ops is the one to beat right now. Nothing wrong with 419, spuhr, Hawkins, MPA badger ect...but they are taking over spuhr in the comp world for good reason. Dave makes awesome stuff.
40-50 MOA can't would be good for a 300prc. Just make sure whatever scope you get has that much adjustment. The ATACR 735 and G3 razors are great scopes but you can find a used ZCO for a little more that is really in another class of optic. Just something to think about.