Re: LR Scope for .300 win mag under $200?
Ok...as has already been pointed out to you above, your $200 budget is going to be GROSSLY inadequate for putting glass on a long-range, precision rifle especially one that will need to withstand the recoil impulse generated by a 300WM and that will serve you at extended ranges (depending on your definition of "longer range shooting" of course).
That said, a used SWFA SS scopes in fixed 10x, 16x or 20x can be had for roughly $250 (or less) on the used market here on the Hide ($300 brand new in the box from SWFA). These scopes are rugged, reliable, offer a sizeable internal adjustment range desirable for a scope to be put to use at longer ranges (especially in combination with a canted scope base), and most importantly for your purposes...won't break the bank. Now, obviously you give up the flexibility of a variable power optic which may or may not be of concern to you, but for your budget, there is no finer optic that the SS. As for the BSA scopes...I wouldn't piss on a BSA if it was on fire!! The Bushnell Elite 10x scopes are also not bad at all for their price range (around $250 new). They have the mil-dot you want and can be had with mil adjustments as well. I believe (don't quote me on this) that MidwayUSA was running a sale on them for $199 through the end of Sept '12. While not a "great" optic by any means, it is a decent piece of entry-level, quality gear that will serve you well until you can get something better down the road. Again...depending on your max intended range...you may want/need more than 10x.
Knowing a little more about what you want in an optic other than: 1) mil dot; 2) hold up to a 300WM; 3) for "longer range" shooting; 4) "good visibility"; and 5) on the cheap...would be helpful in perhaps pointing you in the right direction for any additional optics that might foot the bill for a reasonable price (but remember your audience here...some of us, me included, have $2k+ optics sitting on .22LR trainers)!!
In other words, what ranges are you looking to shoot out to, do you care if the adjustments and reticle match up (i.e. - MOA/MOA or mil/mil as you'll see used commonly when talking about this issue...you should care!), etc. Anyways...just some ideas and things for you to consider for now.
Out of curiosity (and I apologize if you've posted this elsewhere as I've not read any of your other posts that I can recall), what are the specs on your rifle you are having worked on?