Regarding H4831 and temperature, it used to be never thought of. You just loaded up and shot. Once in the summer time, I put some 30-06 loaded with H4831 in the deep freeze over nite. The next day I packed them in insulation and fifteen minutes later was shooting them over a chronograph.
That test proved a failure, as I couldn't detect any difference.
Regarding Norma 205, that was my all time favourite slow powder. It's main advantage was the density of it compared to H4831. One time I did tests with the two powders in the 270 Sako. 60 grains of either with 130 grain bullet gave the same point of impact at 100 yards. I sighted about 2½ high at 100, then aimed dead on the centre of a target at 500 yards that was tall enough to catch the hits. There was really no difference between the two powders, regarding the drop at 500. I had no chrono then, but later this proved out with a chronograph. However, I was using the old war time surplus H4831. The new H4831 appears to be slower, or at least, drives the bullet slower than did the old.
The old Norma 205 developed into the MRP, Magnum Rifle Powder, and it was stated the new powder was better for changing temperatures.
No where did I say a 220 bullet was the best for a 30-06. Read that again.
I too, use Nosler, I drive the 200 grain Nosler at 2700 fps and that just might be the best bullet out there for long or short range.
But talking about the 220 soft nose bullet in the 30-06, it should be remembered that its counterpart in the 303, the 215 grain bullet, was a great favourite with old moosed hunters.