An article I read today about the .458 Win:
"NOTHING IS EVER NEW IN THIS BUSINESS" is an oft-repeated epigram in the shooting world, and not without good reason. Thus it is a near-historic event when a nugget of information comes to light that completely reverses what we know--or thought we knew--about a long discussed shooting topic.
I won't keep you in suspense long, but to get events in perspective, let's go back to a column I wrote called "America's Gift to Africa" (August 2002), in which I praised the .458 Winchester Magnum and expressed some skepticism about rumors of its failing on Africa's biggest and most dangerous game. Rumors began filtering back from Africa not long after Winchester's 1956 introduction of its .458 Mag., alleging incidents of game that got away after supposedly being well hit at close range, and even elephant and buffalo charges that turned deadly because of the .458's lack of stopping power. These are mighty serious allegations against a cartridge on which a hunter might have to stake his life.
A LESS EXPENSIVE OPTION
Such reports, even if second- and third-hand, did not bode well for the future of a cartridge that Winchester heralded as an antidote to the quadrupling prices of traditional British and Continental dangerous-game rifles and cartridges. With a muzzle energy of more than 5,000 ft-lb (as then advertised), the .458 virtually duplicated the elephant-stopping power of the legendary .470 Nitro Express, and did it at a fraction of the cost. Moreover, its companion rifle, Winchester's Model 70, possessed a worldwide reputation for accuracy and reliability at, again, a fraction of the price of double rifles or even carriage-trade bolt rifles.
Thus an M-70 in .458 caliber looked to be the best of all worlds for professional guides and certainly for sport hunters who wanted to go to Africa or other places where big and dangerous animals lurked. Except, that is, for the reports of it not doing what it was expected to do when its full-jacketed solid bullets encountered hard muscle and solid bone.
Such anecdotes were completely at odds with my own experiences with the .458 in Africa, such as my first elephant, which was a head-on upward angling shot (it was that close) with my hand-loaded 500-grain steel-jacketed bullet smashing through the thick skull, into the brain, and exiting behind the head. Other elephants fell just as surely, as did Cape buffalo, safari after safari, causing me to become all the more skeptical of rumors about the .458's shoddy performance. A skepticism which was reinforced by conversations with the professional guides with whom I hunted.
Anyway, my African hunting began in the early 1970s, by which time rumors about the .458's failings had begun to fade. As well as I could connect the dots, reports of the .458's sub-standard performance were circulated only during the late 1950s and early 1960s, when the cartridge was still a newcomer.
NOT ENOUGH POWDER?
These were the reports that stirred some amateur ballistics theorists, in their usual rush to judgment, to speculate that the problem with the .458 Magnum was that its case didn't hold enough powder. Never mind that it delivered two and a half tons of energy at the muzzle--as much as, or more than, several British bluebloods of hallowed repute; somehow it needed more powder. As it turns out, they were on to something. But not because the .458's pudgy case didn't hold enough powder. It was because, at times during the production process, it wasn't being loaded with enough powder!
This came to light when I happened to read an astonishing "Letter to the Editor" in a 2004 issue of Precision Shooting magazine, a nicely done, semi-technical journal devoted mainly to rifle accuracy. The letter's author, Walter Engel, a former Winchester engineer, described his intimate involvement in the development of the .458, and his subsequent discovery of quality problems with Winchester's ammo production line.
In his words: "The production loading machine has a large flat disk that rotates intermittently and there are slots along the periphery that carry the case to each station. This results in a start-and-stop movement, so that a distinct loading operation can occur at each pause. This jarring motion caused the powder to spill out [emphasis mine] of very full cases." In his letter, Mr. Engel goes on to describe the obvious effects of the lost powder as "a loss of velocity." So there you have it.
PROBLEM CORRECTED
How much velocity and energy were lost depended, of course, on how much powder was tossed out of the open cases, but it's reasonable to assume that the amounts varied from round to round. Thus, within a single 20-round box of .458 ammo, velocity/energy levels could vary cartridge to cartridge by hundreds of feet per second and thousands of foot-pounds of energy.
Nowadays, we seldom hear reports of the .458 failing when the chips are down, except when the failing turns out to have been the result of poor shooting, and it's safe to say that once the powder spillage problem was observed, it was immediately corrected.
Meanwhile, in its half-century of existence, the .458 Winchester Magnum is firmly entrenched as the world's most used and recognized cartridge in places where men hunt dangerous animals and put their faith in the cartridges they fire. This in spite of a cloud that once hung over its future, a cloud at last blown away by the simple explanation of a former Winchester engineer who was, in fact, instrumental in the development of the .458, Walter Engel. Thank you, sir.