Re: Getting into long range hunting ?'s 6.5x284
I have never used a Buckmaster, and it's been quite a while since I used a Burris, but this has been my experience in general. For long range shooting you simply must have turrets that are repeatable, and if they are precisely calibrated, say .25 MOA, that is a real plus. If the reticle moves some random number, say .277 MOA, you can figure out what that is, but it makes dialing in corrections that much more complicated down the road.
Virtually all of the low cost scopes I have tried were unsuitable for precision long range shooting. Another factor is low cost variable scopes seem to have a much higher incidence of failure, as opposed to fixed power scopes. As I stated earlier, the Weaver target scopes used to have a good reputation as a good, precision, scope. Another that might be worth a look are the SWFA brand of scopes. I have never used this brand, but I have read a lot about them and the reviews almost invariably state they are very rugged and precise. SWFA's web site shows fixed power scopes from $300-$400.
I would use google and look for reviews on the scopes you are interested, but not just any review, you want to see what long range shooters are saying. One of the best places to search is on this very site.
You can get by with less that Schmidt Bender optics, or 32X, or even 50MM lenses, but a scope that does not track right will only lead to hate and discontent.