Many years ago as a young man times were tough and jobs were scarce (sound familiar). I took a job in a very large sporting goods store where I worked with 50 beautiful young women and when I was not answering their questions both job and non-job related I was busy selling the lastest firearms and reloading equipment to customers. Well after an exciting morning in more ways than one I would often retreat upstairs at the lunch hour to the book section of the stores library where I just happened to discover two of the most fantastic books I have ever read or probably ever will read. The name of the books were "Handbook for Shooters and Reloaders Vol.I and II. by P.O. Ackley". He was perhaps the greatest gunsmith and wildcater who ever lived. He backed up his information with cold hard tests, often complete with pictures. His wildcat creations are still used today many, many years later and his two books were not just reloading manuels but had many amazing stories about his experiments into the then, vast unkown world of ballistics and rifle actions. He astounded the world when he proved that a military rifle that at that time was largely scorned was the safest and strongest rifle action every made. The Jap 6.5 Arisaka. But what I found even more astounding was his article on one of the deadliest calibers ever invented "The 220 Swift". Ackley backed up his claim with actual tests on armor plating and live animals complete with pictures. He fired at a U.S. half-track that had 1/2 inch thick armor plating with three calibers, A military round of 30-06 Armor piercing that penetrated only .07 of an inch, a .270 Winchester with high velocity 100 grain bullets that flatened out and a .220 swift factory load with 48 grain bullet at 4,100 fps. The Swift puched right through the 1/2 inch thick armor plate. This astounded even Ackley who therorized that the bullets high rotational spin had a lot to do with penetration. The rotational spin was a fantastic 212,916 revolutions per minute. Sound familier? Fast forward to the U.S. military that went to the 62 grain .223 bullet out of a fast 1 in 7 twist for more drill like penetration of helmets many years later. And that was not all to this story. Akley and his friends not only hunted deer but had the opportuninty in 1948 in Arizona to thin out herds of feral burros that weighed as much as 600 pounds. They were wild burros that had been specially bred to be as big as Missouri mules by Miners years perviously. The fellows participating in the hunt were all armed with weapons like the 30-40 Kraig, 30-06 and German 8mm. They all laughed when Ackley showed up with a .220 swift but Akley only smiled and promised not to use the gun if it proved too underpowered. Well, when Akley unleashed hell on earth the rest of the hunters saw burro's colapse like they were hit with bolt lightning as far away as 600 yards and even gut shot burros colapsed in their tracks. Soon everyone was screaming to get a turn at using one of the most deadlist calibers on earth. I remember reading articles by others which seemed unbelievable at the time of even Grizzly bears being slain with one shot. Many new calibers have been invented since those days and with todays new super magunums perhaps using very light weight bullets of larger caliber we might have a combination that would beat the old .220 Swift but since no one to my knowledge has tried this we will have to wait and find out if some newer , bigger caliber can equal this feat of the .220 Swift of so long ago.