Last fall I started working up a .357 load using Alliant 2400 in a Rossi 92 with a 16 inch barrel.  Bullet is a 158gr Roze jacketed soft point.   My goal was a full power .357 that could be shot a lot and used as a light general woods gun load if necessary. I worked up to the max book load without any pressure signs and achieved acceptable accuracy.  The last time I shot this load was at the beginning of November on a 49 degree day.  I just recently got back to the range for the first time since then and decided to finish the day with a test of this load in colder conditions as I have read that 2400 is very temperature sensitive.  

I thought you guys might be interested in the results.  I didn't shoot a lot on either day as November was when I settled on the load and today was the end of a range session and I was losing light, so take the following data for what it's worth.  The chronograph also didn't register every shot.

November 2nd
49 Degrees
2400
CCI Small Pistol Primer
Roze 158gr JSP

First string
1760
1747
1763
1767
1750
1698
1755
Avg: 1749

Second string
1765
1743
1744
1768
1749
Avg: 1754

Total average: 1752

January 26th
24 degrees
2400
CCI Small Pistol Primer
Roze 158gr JSP

First string
1756
1748
1763
1772
1739
1748
1779
Avg: 1758

Second string
1759
1736
1697
1743
Avg: 1734

Total average: 1746

I found it very interesting that, on the whole, there didn't seem to be much difference between the two sets despite a 25 degree difference in temperature. I thought there would be a decent drop in velocity.

Thought you all might be interested.

Meant to post this in general reloading.  Mods feel free to lock or delete.