I have learned the same lesson, but in much easier and safer fashion: Many years ago I was range-testing a .338 Winchester Magnum and a .416 Remington Magnum at the same time. Was braced firmly while shooting the .416 when it went off with a tiny "pop" and the bullet kicked up dust about 15-20 yards downrange. Turned out a .338 doesn't produce much pressure or velocity in a .416 chamber!
“Montana seems to me to be what a small boy would think Texas is like from hearing Texans.” John Steinbeck
