Ice cold performane - Vortex Diamondback 20-60x80 Spotting Scope

Bought to replace a broken Konus as an internal rod came loose that now rolls around and rattles as well as it was greased and came in contact with the front glass. I shoot service rifle in CMP matches so for practice I need to identify .223 at 200yds on black targets. I took this scope out on dec 22 17 for an hour and a half, it was 23f, completely overcast, and the range was covered in snow, and ice was on the shooting bench. The angled Vortex Diamondback 20 60x80 preformed flawlessly and showing no fogging, no distortion at edges, clear glass provided quick sighting of .223 bullet holes out at 200 yards and maybe more but that was max for this range. Seems build quality is solid and performance is spot on for the designated task described above. After the failure of my last scope, which at its best was was no competition against this Diamondback, I wanted better clarity on seeing .223 holes at 200 and a more substantial backing of the product with a serious warranty by the maker, which it seems I know have both.