i'm taking a 375 to africa in october.

loads are 300gr woodleighs, 76.gr of h4350 at @ 2530 that's at 70-degrees - of course i'll shoot them in some our 100-degree summer days forthcoming,

But, out of curiosity, what do you think 120-degrees would realistically do to the same load?

New,
Where in Africa are you going to get 120 degree temps in October? It is "December" down there in June. October is "spring" in Africa, and you'd have to get very close to the equator to get 120 in October.

I'd suggest than loads that will shoot well in our spring would be satisfactory "down under." Kudude

zim - it'll be the last week of october.

the ph said it could be as hot as 50C.

I loaded some 600 grain barnes in a 458 win that were fine at 15*f but when shot at 45*F the primers fell out.

That is my only bad experience with temp change.