Nobody even asked the OP where he is located. As a means of full disclosure, I live in the mountains and at-sea-level concerns are not an issue here but altitude, station pressure, angle, temperature, mirage and wind still are. I do agree that pushing a caliber to the limits is usually not a good idea, and 1 mile for 6.5 Creedmoor falls into that category, although it can be done under the right conditions as I said before. All scopes have a designated range and it depends what platform you are purchasing them for as well, i.e. home defense AR15, range shooting AR10, hunting bolt action, medium range bolt action, long range bolt action, or extreme range bolt action - what happens to those scopes when you no longer use them for that particular platform, range, or shot? Your answer is: the P.X. The OP stated he wants a long range scope that can handle long range to what is considered the beginning of extreme long range. As for the Vortex Razor HD (Gen1) being junk, I'd beg to differ vehemently, it can cover more than just the extreme shots and has done so since its inception, the words built-like-a-tank have come up with descriptions of it time and time again. Its optics are still among the first tier scopes regardless that there is a GEN2 with less total elevation but even clearer glass and slightly better turrets and more reticle options; at one time all "professional competition shooters" were sporting it, it is still in use with a good many LE SWAT teams and some military outfits, the 125 MOAs can be adjusted up, or down, and Vortex warranty guarantee is well known and proven among the community. If the OP is going to work with a qualified instructor I'm sure all the bases of technique, and calculations will be covered.