From Surf Wiki (app.surf) — the open knowledge base

.270 Weatherby Magnum

Rifle cartridge

Field	Value
name	.270 Weatherby Magnum
image	Munit03.jpg	image_size = 300px
caption	.270 Weatherby 2nd from left
origin	USA
type	Rifle / Hunting
designer	Roy Weatherby
design_date	1943
manufacturer	Weatherby
parent	[.300 H&H Magnum](300-h-h-magnum)
case_type	Belted, bottleneck
bullet	.277 in (7.0 mm)
neck	.303
shoulder	.492
base	.512
rim_dia	.531
rim_thick	.220
case_length	2.55
length	3.25
rifling	1-10"
primer	Large rifle magnum
bw1	110
btype1	HP
vel1	3528
en1	3041
bw2	130
btype2	X
vel2	3338
en2	3217
bw3	140
btype3	BT
vel3	3242
en3	3268
bw4	150
btype4	SBT
vel4	3161
en4	3329
test_barrel_length	26"
balsrc	Accurate Powder

The .270 Weatherby Magnum was the first belted magnum based on the .300 H&H Magnum to be developed by Roy Weatherby in 1943. The cartridge is short enough to function in standard-length long actions with a brass length of 2.549" or 64.74mm and an overall length of about 3.295".

History and design

The development of the .270 Weatherby Magnum led to the characteristic double-radius shoulders belted magnum case, proprietary of the Weatherby Magnum line of cartridges. Particularly, the .270 Wby Mag the result of necked down to accommodate the .277 in bullets and bringing down the case to fit a standard length action. Like most Weatherby cartridges, the .270 Weatherby was standardized by the Small Arms and Ammunitions Manufacturers Institute in 1994, and it has a SAAMI maximum pressure limit of 62,500 psi. The first Weatherby cartridge to be used in Africa was the .270 Weatherby on a jackal on June 8, 1948.{{cite book

Performance

Given its higher pressure and larger case which holds more powder than the .270 Winchester, the .270 Weatherby has about 200 ft/s faster performance with any particular bullet weight. It also outperforms newer cartridge designs such as the .270 WSM and the 6.8 Western. This performance comes at the cost of more recoil and barrel heat. In addition, a long barrel is necessary to take advantage of extra powder to gain maximum velocity. The cartridge is excellent at long-range hunting, but is not well suited to high-volume shooting such as varmint hunting.{{cite book | orig-year = 1965

For those handloading their own cartridges, this is an easy round to load. It does best with full-power loads and is not well-suited for reduced loads.{{cite book | orig-year = 1962

Sporting use

Due to its flat trajectory result of a combination of a high muzzle velocity and ballistic coefficient, the .270 Wby Mag makes an excellent cartridge option for mid sized big game out to considerable ranges and the fact of being chambered in standard length actions allows the possibility of manufacturing a light mountain rifle.[[Image:.270 Weatherby Magnum.JPG|thumb|right| .308 Winchester (left) .270 Weatherby Magnum (center) .223 Remington (Right)]]

References

".270 Weatherby data from Accurate Powder".
Bullets, Speer. (2009). "Speer Bullets Reloading Manual #14". Speer.
Carter, Aaron. (March 5, 2015). ".270 Wby. Mag.: The Original Weatherby".
Sillars, Jordan. (April 21, 2022). "CALIBER BATTLE: .270 WBY. MAG. VS. .270 WIN.".
".270 Weatherby Magnum".

Info: 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.

weatherby-magnum-rifle-cartridges pistol-and-rifle-cartridges magnum-rifle-cartridges

Want to explore this topic further?

Ask Mako anything about .270 Weatherby Magnum — get instant answers, deeper analysis, and related topics.

Research with Mako

Free with your Surf account

Content sourced from Wikipedia, available under CC BY-SA 4.0.

This content may have been generated or modified by AI. CloudSurf Software LLC is not responsible for the accuracy, completeness, or reliability of AI-generated content. Always verify important information from primary sources.

Report