The attached data was shot over the past year at various temperature. The 270 was shot out of a Forbes with a 24 inch barrel. The 30-06 is a SAKO 85 with a 22.4 inch barrel. The velocity are a 3 shot averages.
Temperture/Velocity
Loads Temp/Velocity fps Temp/Velociy fps Temp/Velocity fps
270 Win; 130 gr, 57.5 RL 22 90/3184 45/3145 29/3086
270 Win; 140 gr, 56.0 RL 22 90/3021 45/2943 29/2995
270 Win; 150 gr, 54.0 RL 22 90/2905 45/2880 29/2870
30-06; 165 gr, 56.5 RL 17 90/2923 45/2857 29/2858
30-06; 180gr, 57.0 H4350 90/2782 45/2749 29/2722
Overall, the velocity variation at various temperatures is excellent for hunting.
Temperture/Velocity
Loads Temp/Velocity fps Temp/Velociy fps Temp/Velocity fps
270 Win; 130 gr, 57.5 RL 22 90/3184 45/3145 29/3086
270 Win; 140 gr, 56.0 RL 22 90/3021 45/2943 29/2995
270 Win; 150 gr, 54.0 RL 22 90/2905 45/2880 29/2870
30-06; 165 gr, 56.5 RL 17 90/2923 45/2857 29/2858
30-06; 180gr, 57.0 H4350 90/2782 45/2749 29/2722
Overall, the velocity variation at various temperatures is excellent for hunting.