Adaquate, Possibly. Depending on what you expect out of the scope.
Generally you want to spend as much as you can afford on glass, and when you spend more you gain in precision mechanism, clear glass, and durability. The one I would be worried about is durabilaty. I am not an expert on optics, but I would be leary of putting a buckmaster on a moderate recoil rifle like a 300 for hundreds of rounds if you are expecting precision accuracy. On the other hand, I wouldn't think twice about mounting a Buckmaster or even a prostaff on that rifle if I was not going to shoot past 450 or so.
I think the Monarch would be better suited for that. I put 30 rounds through my 300 WSM with that scope on it to test it since My 22-250 didn't come in yet, but honestly I don't think I will make it a habit of mounting that scope on that rifle. I have a Monarch 5.5-16.5 on it usually.
I am quite confident that it will work for now. Hopefully someone more experienced will chime in for you. Good luck, Mark.
I used to re-load but now I "hand-load".
-- Well, at least I try