Milo,
you missed out on a great magazine in Precision Shooting. Mostly guys who shot and reported back on results, and short range BR matches. PS had an in depth article on the two "P"s who invented the 6PPC in the mid seventies. A dentist named Palmisano, and Ferris Pindell, a machinist who made most of the bullet dies for the factories. Brian Litz is his 21st century counterpart.
A gunsmith named Seeley Masker who teamed up with Dave Tooley and a few others, who offered an accuracy alternative to the PPC when NORMA would not produce sufficient quantities of quality PPC brass. Masker took 30-30 brass, which was nearly identical in specs to the basic PPC brass, and created the 6MM SM Wasp, an update of Harvey Donaldson's 219 Don Wasp about 85 years ago. It worked well enough that PS magazine promoted it to Federal, who manufactured the 30 American cartridge. 30-30 case built by the special match brass crew. It featured true match specs, a small primer pocket, and nearly knocked the PPC case out of BR. The old NORMA brass was so soft, competitors prepped the case, shot a warm-up match, five reloads, and often held the primer against the case with their thumb to get that fifth reloading.
Boyd Mace started the section on long range live varmint shooting, applying BR quality standards to Prairie Dog shooting out in the west. He was a maintenance supervisor at the Bridger Power Plant in Bridger, Wyoming. A year or two later I got involved, same project shooting Rockchucks in Idaho. The fancy multi-reticle range finder style scopes so common these days, 25 years I got Premier Reticle in Winchester, VA, to do a boost of a Leupold 6,4-20X 40mm scope to 18-42X, and convert it to first focal plane reticle and multiple windage lines and dots.
I am NOT boosting myself, just letting this generation know all the wonderful accuracy things were done a quarter-century ago at PS magazine.
It was a magazine for accuracy shooters, written by a non-professional staff. Like here, shooters just conducted an experiment, and wrote it up. Oh, yeah, there was no internet at that time, or cell phones, or way to share what was learned other than PS.