Vortex Viper spotting scope?

I bought one last year for spotting deer, & long range shooting. I used it maybe 4-5 times, & sent it back. Chromatic distortion was TERRIBLE. I bought a Bushnell Legend Ultra HD for a little more than the Viper, & was blown away by the performance.
 
I am happy with mine. Glass is pretty good but does dim a bit at full power (45X, 65mm). I could easily see .17 cal holes at 250 yds. Little heavy for backpack hunting. Mine does not have the CA Bigwheels saw in his.