Scotty,
Glad you're enjoying the book!
Some hunters think temperature-resistance is overblown--and it isn't very important under most circumstances, especially shooting most big game at ranges under 400 yards, under most conditions. But one of the major trends of smokeless rifles powders since they were developed in the 1880’s has been decreased temperature sensitivity, because it definitely does make a difference in some shooting.
Tis true. It's nice to have a choice of powders that are less sensitive than their older cousins. They are improved propellants (ain't progress wunnerful?) that, among other things, provide some wiggle room when the sun comes out or when developing a year round load.
That said, for those that have an old favourite that they do not wish to give up, it only helps to load it down a grain or two.
Reaching maximum velocity (and pressure) shouldn't be the goal for reloaders. The objective should be to find the sweet spot: a combination of the right velocity for the bullet and acceptable groups, but not necessarily the tightest.
![[Linked Image from i.imgur.com]](https://i.imgur.com/AP39Jhm.jpg)
