.240 Apex

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title: ".240 Apex" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["pistol-and-rifle-cartridges", "magnum-rifle-cartridges", "british-firearm-cartridges", "holland-&-holland-cartridges"] description: "UK sporting rifle cartridge" topic_path: "geography/united-kingdom" source: "https://en.wikipedia.org/wiki/.240_Apex" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0

::summary UK sporting rifle cartridge ::

::data[format=table title="Infobox Firearm Cartridge"]

Field	Value
name	.240 Magnum Rimless
origin	England
type	Rifle
designer	Holland & Holland
design_date	1919
manufacturer	Holland & Holland
case_type	Belted, bottleneck
bullet	.245
neck	.274
shoulder	.403
base	.450
rim_dia	.467
rim_thick	.035
case_length	2.49
length	3.21
primer	Kynoch # 81
bw1	100
btype1	SP
vel1	2900
en1	1865
balsrc	Cartridges of the World.
::

|name= .240 Magnum Rimless |image= |caption= |origin= England |type= Rifle |service= |used_by= |wars= |designer= Holland & Holland |design_date=1919 |manufacturer=Holland & Holland |production_date= |number= |variants= |is_SI_specs= |parent= |case_type=Belted, bottleneck |bullet=.245 |neck=.274 |shoulder=.403 |base=.450 |rim_dia=.467 |rim_thick=.035 |case_length=2.49 |length=3.21 |rifling= |primer=Kynoch # 81 |is_SI_ballistics= |bw1=100 |btype1=SP |vel1=2900 |en1=1865 |bw2= |btype2= |vel2= |en2= |bw3= |btype3= |vel3= |en3= |bw4= |btype4= |vel4= |en4= |bw5= |btype5= |vel5= |en5= |test_barrel_length= |balsrc= Cartridges of the World. |name= .240 Magnum Flanged |image= |caption= |origin= |type= |service= |used_by= |wars= |designer= |design_date= |manufacturer= |production_date= |number= |variants= |is_SI_specs= |parent= |case_type=Rimmed, bottleneck |bullet=.245 |neck=.274 |shoulder=.402 |base=.448 |rim_dia=.513 |rim_thick=UNK |case_length=2.5 |length=3.25 |rifling= |primer=Kynoch # 81 |is_SI_ballistics= |bw1=100 |btype1=SN |vel1=2775 |en1=1711 |bw2= |btype2= |vel2= |en2= |bw3= |btype3= |vel3= |en3= |bw4= |btype4= |vel4= |en4= |bw5= |btype5= |vel5= |en5= |test_barrel_length=28 |balsrc= Kynoch The .240 Magnum Rimless Holland & Holland (also known as the .240 Apex and the .240 Super Express) is a centrefire sporting rifle cartridge developed in English gunmakers Holland & Holland no later than 1919, primarily for use in hunting deer and plains game.

As it was common for rimless hunting cartridges, a rimmed (beltless) variant, at the time called just "Holland's 240 Super Express" and now sometimes named .240 Flanged Magnum or .240 H&H Flanged, was developed simultaneously for break-barrel rifles and combination guns.

Overview

The ballistic performance of the .240 H&H in factory loads is very similar to that of the .243 Winchester, with a 100 gr bullet with a diameter of .245 inches (contrary to the .240 name) giving a muzzle velocity of approximately 2900 ft/s. When it is loaded at the same pressure as the .243 WSSM using modern powders, the .240 H&H has the potential for slightly better performance.

Most bolt-action rifles made for the .240 H&H will be amply strong enough to handle hand-loaded cartridges at high pressure.

::data[format=table title=".240 H&H Performance Comparison"]

Cartridge	Bullet weight	Muzzle velocity	Muzzle energy
.240 H&H Magnum	100 gr	2900 ft/s	1865 ft·lbf
.240 Weatherby Magnum	100 gr	3406 ft/s	2576 ft·lbf
.242 Rimless Nitro Express	100 gr	2800 ft/s	1740 ft·lbf
.243 Winchester	100 gr	2960 ft/s	1945 ft·lbf
.243 Winchester Super Short Magnum	100 gr	3110 ft/s	2147 ft·lbf
.244 H&H Magnum	100 gr	3500 ft/s	2720 ft·lbf
.246 Purdey	100 gr	2950 ft/s	1930 ft·lbf
6 mm Lee Navy	100 gr	2680 ft/s	1595 ft·lbf
6 mm Remington	100 gr	3100 ft/s	2133 ft·lbf
::

References

References

1. Barnes, Frank C., ''Cartridges of the World'', 15th ed, Gun Digest Books, Iola, 2016, {{ISBN. 978-1-4402-4642-5.
2. [http://www.kynochammunition.co.uk/cartridge%20collection.html Kynoch Ammunition, "Big Game Cartridges", ''www.kynochammunition.co.uk''], [https://web.archive.org/web/20150527033406/http://www.kynochammunition.co.uk/cartridge%20collection.html archived], 15 August 2016.
3. "Holland & Hollands "Apex" .240 super express rifle".
4. [https://dspace.nplg.gov.ge/handle/1234/84132 H&H 1933 catalog]
5. "240 FLANGED MAGNUM | Cartridgecollector.net".

::callout[type=info title="Wikipedia Source"] This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page. ::