I do not doubt it.

Two years ago in the summer we had three days in a row with hard white frosts in the morning and over 100 by late afternoon.

The bit about the .416 Rem being "pressure sensitive" makes no sense to me. Unless some guy is working up max loads in January and then expecting them to function fine in the heat of summer. Anyone who is a handloader knows better than this, so I do not understand why the beef goes on.

I suppose the pressure sensitive issue does come from the old days of cordite loads and ammo developed in the UK where of course high temps do not reach those of Australia, Africa or North America. But with today's powders and judicious loading, the issue is as dead as Clinton's honor.