An interesting fact is that Jeffery and Westley Richards were in competition for sales in the largest of rifles. Jeffery touted his .600 and Westley Richards strongly promoted the .577 (the nitro version was introduced approximately the same time as the .600). Old Westley advertisements stated the .577 rifles were lighter in weight, produced less recoil, and had higher foot pounds of energy than the .600. The Jeffery, in turn, stated ballistics of 8400 foot pounds of energy rather than 7600. (The 8400 foot pound figure is indeed achieved with a cordite charge of 120 grains, but this was never loaded commercially).
The 100- and 110-grain charges were the most common, and at least two Jeffery rifles exists that are proofed for the 120-grain load. One writer stated that all Jeffery rifles were proofed for the 100-grain charge which is absolutely not the case. Only nine of the 70 Jeffery rifles list the cordite charge in the factory ledgers. It seems most Jeffery rifles were made for the 100-grain charge (and perhaps all of the single shot rifles) and it was a mixture of the 100- and 110-grain charge that was spread between the remainder of the makers. During my research, a unique Westley Richards single shot has been uncovered for a perhaps one-of-a-kind charge of 105 grains of cordite. In addition, Kynoch mentions in an early catalog (1905): “W.J. Jeffery uses 130 grains of cordite which we load on his responsibility.” The sentence was underlined to show its importance. To the best of my knowledge no ammunition for the 105- 120- and 130-grain charges have been discovered, nor has an original rifle regulated for the 130 grains of cordite. A 120-grain Jeffery was advertised and sold at auction around 2010 (I was out-bid), and at least one other exists..
A big cartridge must have big and impressive ballistics. 8400 foot-pounds of muzzle energy has been quoted in vintage catalogs and has been repeated in contemporary writings. Muzzle velocity has been quoted at 2000 feet per second and higher. The facts are, standard factory ammunition was listed as 1850 fps for the 100-grain charge of cordite and 1950 fps for the 110-grain charge of the same propellant. 2050 is the velocity for the 120-grain charge and many old catalogs quoted this figure as the accepted velocity for all .600 cartridges. This was to draw attention away from the .600’s closest competitor–the .577 nitro express. The 1850 and 1950 fps velocity figures are from 28-inch test barrels. To obtain an accurate velocity one must subtract approximately 25 fps per inch of barrel less than 28 inches. So, in common 24-inch barrels, the accepted muzzle velocity will be about 100 feet per second slower (i.e. 1750 and 1850 fps for the 100- and 110- grain charges of cordite). The single shot .600 made for 105 grains of cordite and the two known doubles made for the 120-grain charge must have come with custom-loaded ammunition as neither charge has been documented in Kynoch or Eley catalogs.
As to the 130-grain charge of cordite: nothing has been seen on the 130 grains charge except the quote as mentioned above by Kynoch, and no rifles have surfaced. To speculate a bit, 130 grains of cordite would propel a bullet of 900 grains at 2150 fps. This would give a muzzle energy figure of 9240 foot pounds of energy. Quite a handful to state the least!
Weight of the .600 rifles
Powerful rifles need added weight to control recoil. My 4-bore Rodda weighs in at 23 pounds and with black powder the recoil is unbearable with a 4¼-ounce bullet (1882 grains). The average weight of .600 rifles has been listed as high as 18 pounds, but actually the average is 15½ pounds. While the recoil of a .600 is heavy it is not unmanageable. That said, I owned one of the last batch of seven .600 Jeffery single shot rifles, made for 100 grains of cordite. Acceptable recoil in a 16-pound double rifle, but the recoil was horrendous in my 11-pound single shot. After two shots, I sold it!
I have read that in the 1980s, when Bill Feldstein was developing the .700 nitro express, in conjunction with Holland & Holland and Jim Bell, it was determined the most recoil a man could handle was that of a .600 nitro express. To make a .700 to have the felt recoil of a .600, the rifle was to weigh 19 pounds. With that in mind, I have a theory: When the .600 was developed (and then revised in 1902) the .577 nitro express was already in production and the recoil of it was at a shooter’s and hunter’s limit. To make the .600 to have the felt recoil of a .577, the rifle’s weight was increased to average in the 15—16 pound range (about 2-3 pounds greater than the .577).
Makers of the .600
Every maker of .600 rifles will never be known as so many factory ledgers and records were destroyed in the bombings of WWII. For the same reason the exact number of .600s will never be known. While some makers of the .600 are still in business today (Holland & Holland, Westley Richards, Purdey and others) .600 rifles were also sold by Army and Navy, Evans, Churchill, Greener, Lancaster, Lang, MacNaughton, Osborne, Rodda, Webley & Scott, and Wilkinson. On the continent, Belgium, French, and German makers produced the .600. The retailers in India included P. Orr, Walter Locke, RB Rodda, Lyon & Lyon, and Manton, and they sold .600s from the makers if requested by a sportsman. They also purchased .600s “in the white” and finished in company shops with their name and serial number. W&C Scott and Son made countless rifles for retailers. (My 12-10-8- and 4-bore rifles and shotguns in the same bore sizes were made by Scott, but all are from different retailers). There were many more .600 makers and retailers, no doubt, and we won’t know of them until a rifle surfaces.
Writers throughout the 20th century have stated that all Jeffery rifles were snap action and that all Jeffery doubles were on boxlock actions. Not true! While Jeffery produced the most .600s and most of these were on their snap action, Jeffery also produced a few sidelock double rifle and their first double was an exposed hammer with a Jones under lever. Holland & Holland, Purdey, and R.B. Rodda also produced sidelock .600s. The .600s show a variety of top lever, under lever, snap action, boxlock, sidelock, and falling block single shot rifles produced.
The Last .600
Much has been written about this rifle and its near mythical status. It has been written that the owner of this rifle was offered a huge sum of money if he relented and allowed Holland to continue building the .600s. That the rifle was made for an eccentric collector who wanted the best of everything money could buy. That the rifle is stored in an underground grain silo, etc. I have seen and held the last .600. Here are the facts.
It was common knowledge in the 1960s that the years of elephant hunting were about over. Ammunition was getting scarce with no hope of Kynoch continuing production. To honor the great .600 cartridge, Holland & Holland decided to build what many at the firm still believe to be the finest rifle they ever manufactured. Began in 1970 and completed in 1975, it was ordered by, and sold to, a gentleman from the Midwest. He and his son had a 50-50 share in this rifle. The son, who is the owner of the rifle now, told me he wanted to go in 50-50 with his father so it would be in his collection someday. Holland stated it was to be the last rifle of this caliber they would produce. The rifle was sold with that understanding. The father and son hunted in Africa numerous times and collected many fine rifles–including several vintage .600s–as a labor of love, long before it was stylish to do so. The “last .600” remains in the family collection and is unfired to this day. It is most assuredly NOT in a grain silo!
One unconfirmed story is that Holland &Holland, knowing the glory days of elephant hunting and cartridges for the rifles were coming to an end, was to build a series of three “last” rifles–.600, .577. and .500 nitro expresses. Only the .600 was produced. Why the .577 and .500 were not produced has been lost to history–if they were planned to be made at all.
In the 1980s an American collector and hunter with vast African experience approached Holland & Holland to build him a .600. The company refused as they were bound by the contract with the purchaser of the “last .600.” As the .600’s production at Holland &Holland was at an end, the company designed the .700. A few years later, when Holland & Holland was approached by additional collectors regarding a .600, they came to an agreement with the owner of the “last .600” to again begin production. A pair of Royal 20-bore shotguns, in individual oak and leather cases, was produced for the owner, and Holland & Holland again resumed .600 production as they were released from the contract.