Roy Weatherby had expected that the .378 Weatherby Magnum to make some headway in the African continent but believed that his cartridge was being bypassed for low velocity, big bore cartridges by professional hunters who he felt were resistant to change. The hand loading brass can gain higher velocity in 26 inch barrels than factory loads, with 140 grain bullets reaching up to 3,300 ft/s depending on the type of powder that is used in the cartridge. Weatherby’s views on high-velocity impacts and the .270 Wby. This performance comes at the cost of more recoil and barrel heat. When we skinned this fellow out, one could hardly … The 2.70 Weatherby Mag. WEATHERBY CARTRIDGES. Roy Weatherby introduced his first big-game cartridge, the .270 Weatherby Magnum, in 1943 and began offering handloaded ammunition in 1945. The velocity gain over the .375 H&H Magnum works out to be about 240 ft/s (73 m/s) and an increase in maximum point blank range of about 25 yd (23 m) with bullets of equal weight. 270 Weatherby Magnum Rifle Cartridge. The .240 Weatherby Magnum was designed in 1968 by Roy Weatherby and was also his last cartridge design. 30 Carbine Ammo . Find your best price for 270 Wby Mag Ammo | Best 270 Wby Mag Ammunition - AmmoSeek.com Search Engine 2020 As you can see, since the loads for each cartridge used the exact same bullet and since the 270 WSM had a slight advantage (about 200-300 fps) in velocity it has a slightly flatter trajectory than the .270 Winchester that’s nearly on par with the .270 Weatherby (270 Wby). .450 Marlin, .30-30 Winchester, .307 Winchester, .350 Remington Magnum, .327 Federal Magnum, .44 Remington Magnum (Pistol Data), .45 Colt (often called .45 Long Colt), 6.5x54 MS (6.5 Mannlicher-Schoenauer), 7.82mm (.308) Lazzeroni Patriot, .460 Smith & Wesson, .38-55 Winchester, .416 Weatherby Magnum, .416 Dakota, .22 Hornet, .375 Dakota. 284 Winchester Ammo. , 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.  when both were loaded to the same chamber pressure. In 1945, Roy Weatherby shortened the 300 H&H Magnum, blew out the body, necked it down to accept a 270 bullet and gave hunters a flatter shooting, harder hitting 270. Factory loads on the .270 Weatherby Mag. How to Sight in a Scope - Step by Step Guide. Find your best price for 270 Wby Mag Ammo | Best 270 Wby Mag Ammunition - AmmoSeek.com Search Engine 2020 Being a proprietary cartridge, the .270 Weatherby has no official SAAMI maximum pressure limit. 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. 270 Win Short Mag Ammo. .270 Weatherby Magnum. Hand loads and more especially the Hornady Light Magnum loads for the .270 Winchester can come close to .270 WSM velocities however, the WSM is … , For those handloading their own cartridges, this is an easy round to load. 270 Winchester Ammo. 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 first number is the value of this cartridge, and the last number is the value of the most powerful round in our bullet database. 30 Nosler Ammo. Today, those same performance qualities are every bit a part of Weatherby cartridges. To put this into perspective, a Boeing 737 commercial airliner travels at a cruising speed of 600 mph, or 880 fps. 270 Weatherby Magnum Rifle Cartridge. The .300 Weatherby Magnum is a fast, hard-hitting cartridge, driving a 180-grain bullet to a muzzle velocity of 3250 fps, for over 4,000 ft.-lbs. 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. 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