I have no experience with the Sightron other than by reputation, but have a couple models of the Weaver Tactical 3-15 and 4-20X. The Weaver tactical is a good scope in that price point. Adjustments are consistent and optical quality is excellent for the price point. The optics are comparable to SWFA's 3-15x with the edge going to SWFA on optical clarity.

At high magnification the edge to edge clarity suffers slightly, but it was not significant. Crispness of the target or color correctness was also slightly off, but that could be more about my eyes than the scope. I had this on a long range AR and Rem 700 in 308 and had no issues ringing steel consistently at 6-800 yards.

Weaver tactical is a good value for the quality that you receive.