Questions on bullets and powder

[VASCAR2]

From what I’ve read CFE223 looses around 1 FPS per degree. Even if it was 1.5 FPS per degree I don’t think you’d loose enough velocity at sea level to hurt expansion to at least 200 yards with 129 grain soft point. Comparing CFE223 powder to powders like Winchester 748, H-335, TAC, BLc2 your likely to get more velocity with CFE223 to still have higher velocity than possible with some other powders. Two other more temperature stable powders recommended are AR Comp and IMR8208XBR. I have not tested any IMR4895 or H4895 but I’ve read it is more temperature stable than some ball powders like CFE223.