The 200gr XTP is a good economical choice, but I am suprised your are having trouble finding the 200gr SW.
The sabot you need is available directly from MMP
http://www.mmpsabots.com/
You might check your local walmart,I caught the sale on 200gr SW last week and bought the last 8 boxs for $5 apiece.
You will find a quite a bit of difference in LONG range trajectory the 200gr is I believe the very best long range and all around bullet and normally the easiest to get good accuracy with, Triple Se7ensaid a lot that need saying on this the only thing thats not good about those bullets is the price , unnecessary for deer sized game but if you are going after elk sixed game I like them dispite the unbelieveable price. Read what he sayed about the sabots its the only draw back the these bullets only it dont sound like you have that problem. Lee