244 Holland & Holland

[Pripyat]

Finner ikke så mye informasjon om dette kaliberet, er det noen på kammeret som eier en rifle i dette kaliberet?

 

Såvidt jeg forstår dreier det seg om en kraftig nednecket 375 hylse som skyver en 100 gramskule i over 1100 m/sekundet?

 

Finnes etter det jeg har funnet ut ingen som lader dette fra fabrikk, så det er vel et kaliber som er forbeholdt hjemmeladere..

[Pripyat]

Holland & Holland did not originate the cartridge. It was invented by David Lloyd who sold the rights to produce the cartridge to H&H.

 

Here is a good article about the development of the cartridge and a little history:

.244 Holland & Holland (H&H) Magnum

 

Holland & Holland introduced their .244 H&H Magnum cartridge in 1955. Produced by Holland & Holland and designed by deerstalker and rifle-maker David Lloyd (d. 1996), of Pipewell Hall, Northamptonshire and Glencassley in Sutherland, Scotland. Lloyd hunted on steeply sloped deer forests such as his own at Glencassley and Lloyd sought a "canyon rifle" cartridge that would shoot exceptionally fast and with a very flat trajectory across deep valleys and over distances out to 300 yards (270 m) and more. Lloyd wanted to make range estimation less critical for accurate bullet placement, and to deliver a hard-hitting bullet weighing a minimum of 100-grains (10 g). The .244 H&H Magnum easily met these criteria.

 

Based upon the well proven .375 H&H Magnum rimless belted-magnum big game cartridge case necked down to .245 inch bullets, the .244 H&H originally fired a 100-grain (6.5 g), aluminum-jacketed, copper-tipped bullet propelled by 74-grains (4.8 g) of non-cordite smokeless (nitrocellulose) powder, and returned a muzzle velocity of about 3,500 feet per second (1,100 mps). That load and velocity remain standard for the commercially-loaded cartridge. Hand loaders achieve higher velocities with careful load tuning. The .244 H&H Magnum seldom performs well in barrels less than 26 inches (660 mm) long, due to the .244 H&H Magnum needing a longer bore to allow pressure and bullet velocity to reach intended levels.

 

Lloyd was unable and unwilling to embark upon commercial cartridge production, and consequently "gave" the cartridge to veteran London rifle and ammunition makers Holland and Holland Ltd., who in 1954 paid Lloyd £250 towards his cartridge development costs. H&H quickly adopted .244 cartridge and designated it with the prestigious "H&H" appellation. Both Holland & Holland and David Lloyd went on to build significant numbers of very high-quality bolt-action deer-stalking rifles in .244 H&H Magnum caliber.

 

Initially, IMI Kynoch manufactured the commercially-loaded .244 H&H Magnum ammunition their Birmingham, England factory. Commercially, the .244 H&H Magnum cartridge has only been loaded with 100-grain (6.5 g) bullets. Handloaders have loaded lighter and heavier bulleted loads.

 

Chuck Hawks, a prominent US commentator on rifle cartridges, opines that, "the .244 H&H Magnum represents some sort of high water mark in the development of the 6 mm cartridge. To use an aviation analogy, you could think of it as the Concorde of rifle cartridges." [2]

 

David Lloyd, the .244's originator, went on to develop a still more powerful prototype round by reducing the case body taper and increasing the already large power capacity to produce the "David Lloyd 6 mm Magnum". Lloyd hoped to utilize heavier bullets than the .244 H&H standard 100-grain (6.5 g). Lloyd’s cartridge never saw commercial production and only two prototype Lloyd rifles are believed to have been chambered for it.

 

In the early 1990s British fieldsports author and ballistician Colin McKelvie had a custom rifle built on a BRNO CZ Magnum action, with a .244-in Border Barrel with a 1:7 fast twist. Using hand loads with very-low-drag (VLD) .244-in hollow-point bullets of 115-grains (7.5 g), McKelvie achived accuracy of 0.63 MOA with an average muzzle velocity of 3,630 fps (1,106 mps). Lloyd had sought this level of performance with his "improved" .244 H&H Magnum.

 

While the belted .244 H&H Magnum could be considered the velocity/energy pinnacle of 6 mm/.240in cartridges, that power comes at the cost of significant muzzle blast, as well as shorter-than-average barrel life. In addition, the commercially loaded ammunition proved costly. These factors prevented the cartridge from enjoying widespread popularity. No major rifle manufacturers have ever offered the .244 H&H Magnum as a chambering option. The .244 H&H Magnum rather fell by the wayside in favor of 6 mm rifles in the same general class such as the .240 Weatherby Magnum (for which the .244 H&H Magnum had been an inspiration to designer Roy Weatherby), and also the various 6.5 mm Magnums.

 

The .244 H&H Magnum still has its adherents, however, and occasional rifles are still chambered in this caliber, by Holland & Holland and others. Ammunition is still manufactured for Holland & Holland. Such extremely high velocity calibers invite controversy, and the .244 H&H has been passionately condemned (invariably by commentators with little practical experience of it) as a result of some reports of rifles blowing-up or seriously malfunctioning due to massively excessive chamber and bore pressures. A few such incidents have occurred; but the fault in all cases has been found to lie with the rifles' owners' failure to keep the bores scrupulously free of accumulated copper fouling. The very fast, rapidly spinning .244 bullet tends to deposit bullet gilding metal fouling rather readily, especially in a roughly bored barrel, and as this deposition builds up the bore becomes constricted and internal pressures rise exponentially, sometimes to and beyond danger point. Accurate and safe shooting with the .244 H&H - an extreme cartridge - has always been predicated upon meticulous bore cleaning, which is essential. Where this has been done, no rifle has failed to perform well and safely.

 

Despite the .244 designation, the .244 H&H Magnum actually uses a bullet of .245in diameter, similar to its older, much milder H&H predecessor, the .240 Apex; and this has been a source of some confusion, and of frustration to hand loaders. Most typical 6 mm caliber cartridges use a .243-in bullet. While there is a wealth of market choice for the hand loader seeking good .243-in diameter hunting bullets, such as are used in the .243 Winchester, the .245-in bullet is only made in one 100-grain (6.5 g) type, exclusively for the commercial manufacturers of this cartridge. Attempts to use conventional .243in bullets in a H&H or Lloyd barrel bored for .245 have been disappointing, with indifferent accuracy. However, a few enthusiasts have achieved very good results with custom-made rifles, using .244 H&H chamber reamers on barrels bored to .243-in, using standard .243in bullets.

 

Bullet diameter: .245 in

Rim diameter: .532 in

 

Loads:

55 gr @ 4,034 fps (1,229.6 mps)

95 gr @ 3,522 fps (1,073.5 mps)

100 gr @ 3,500 fps (1,070 mps)

 

.244 H&H Magnum

 

Type Rifle

Place of origin United Kingdom

 

Production History

 

Designer David Lloyd

Designed 1955

Manufacturer Holland & Holland

Produced 1955

 

Specifications

 

Parent case .375 H&H Magnum

Case type Belted-magnum, rimless

Bullet diameter .245 in (6.2 mm)

Neck diameter .263 in (6.7 mm)

Shoulder diameter .445 in (11.3 mm)

Base diameter .508 in (12.9 mm)

Rim diameter .532 in (13.5 mm)

Case length 2.78 in (71 mm)

Overall length 3.58 in (91 mm)

 

Ballistic Performance

 

Bullet weight/type Velocity(MV) Energy(ME)

100 gr (6.5 g) SP 3,500 fps (1,100 mps) 2,720 ft·lbf (3,690 J)

 

Source: Cartridges of the World [1]

 

[1] Cartridges of the World 11th Edition, Book by Frank C. Barnes, Edited by Stan Skinner, Gun Digest Books, 2006, ISBN 0-89689-297-2 pp. 380, 532

 

Best.

[flanged]

Eg fann ingen andre enn H&H som kan ha ferdig ammunisjon i dette kaliberet ! Uansett så er hjemmelading tingen, om du finn dei komponentane du treng....

 

 

 

[Pripyat]

Flotte bilder!

Ja, man blir å bestille fra Holland & Holland - tror de levererer ferdig ladde kuler...

[flanged]

Sidan du allereie har bygd deg ein custom 375 H&H, så hadde kanskje ein 300 H&H òg vore eit godt alternativ til 244 ?

 

Her éit par matched custom prosjekt i 375 og 300.

 

[Mullins]

Robert Ruark brukte en slik også i noen år på jakt. Ikke samme kulediameter som .243, men litt grøvere. Det er noen engelske Lloyds rifler til salgs her også . http://www.emmacustomrifles.co.uk/WelcomeFrameset.htm

[Pripyat]

Du sier noe, Flanged.

Men nå har det seg sånn at jeg også har en .275 Rigby custom på vei, så man sliter vel med å få brukt alt nok.

Når det er sagt må jeg innrømme at det hadde vært kult å ha et batteri med bare H&H kalibre.

 

Denne var kul:

 

 

David Lloyd.

Classic English handmade rifle.

.244 Magnum.

Bolt action, inc Swarovski 4x scope.& mounts.

[Jaktfalken]

For noen smykker . Godt å se sånt i disse 'løpsbytterettrekkertider'

[Mullins]

http://www.thestalkingdirectory.co.uk/s ... 44-H-amp-H

 

Litt mer info om at den har .245 inch kuler og ikke .244 som .243 og 6 mm BR og andre har .

 

http://new-kynoch.apt-sites.com/cartrid ... ction.html

 

De har en .240 HH Flanged forløperen til .244.

 

http://www.municion.org/Holland/240Hh.htm

 

Hvis en vil ha en patron som mimiker de så er 6mm Rem, 6x57 eller 6mm-06 like, men har de sjarmen som de engelske har ?

 

http://www.christies.com/lotfinder/lot/ ... ID=4178674

 

 

Smyge seg rundt i gedigne hjorte heg... ehh frittgående hjorte områder ( nå ble det pk ) med den der og et par esker ammo i lommen , mens stalkeren og karene henter det viltet som er felt .