ball powders

[casullman]

I have read/heard of this ball powder pressure spike in hot temps has anybody experienced this at the range in the summer or when its very hot out?

[Guesser]

I've been using W760 in 270 Winchester for over 30 years in several states including Hawaii and Montana, Idaho, Washington in all seasons and have never experienced the spike you talk about. I am aware that they possibly burn hotter and can lead to throat erosion. I did replace a 270 barrel that had started to loose accuracy after only approx. 8,000 rounds using W760 for most of its life.
I've also used a lot of H-110 in magnum handgun rounds in handguns and carbines, never found it to be inconsistent.
I dunno!!!!!!!