I did shoot some 180 ABs with Benchmark and N530 in cold and at room temp. Ammo and rifle sat out a few hours at 9deg. All 8 were loaded at the same time from same group of brass, primers and bullets. I randomly picked two for the cold and left two of each indoors. I alternated firing each

Benchmark was a couple FPS faster in the cold. More variation in the N530 readings.

180 AB
46.5 N530 Warm: 2758/2775 Cold: 2738/2716
46.5 Benchmark Warm: 2748/2746 Cold: 2751/2754