Re: Bushnell Tactical or Tasco SS
Both are very nice scopes for the money. The Tasco has a wider field of view and slightly better optics. Both are equally functional.
If budget is a concern, then the Bushnell is a fine choice.
If going to 600yds, just about any 1" scope will work too so your options are broader.
For competition, I like to have higher mag if the weather will allow. That is why I use the B&L/Bushnell Elite 4000 6X24. Very nice optics, much better then the other two, and repeatable adjustments. Not much more then the Tasco.