The Contestants. The Weatherby rifle chamber features a long free bore while the Remington is quite the opposite, in some instances almost strangling its loads. If you compare the 7 mm Mag vs. the .300 Mag they are almost identical out to 300 Yards. Same scenario about 200fps. Second is the ballistics. The major difference between the two, is the design of the rifle chambers. The magnum factor just sounds better just, think if the 270win. Magnum. The author analyzed six .338 caliber magnum cartridges (.338 Winchester Magnum, .340 Weatherby, .338-378 Weatherby, .338 Remington Ultra Mag., 33 Nosler, and .338 Lapua) for trajectory, effective range, and recoil with modern ballistic software available free online from shooterscalculator.com. First is the recoil, 25.9 Ft-Lbs. I’ve sent hundreds of rounds of 340 Weatherby down range and was enamored with the … Refine by Caliber: 7mm Rem Magnum 7mm Win Short Magnum. Drift at 1000: 52 inches. .340 Weatherby Magnum ...Click for more info. I suspect that Remington did more than a little testing of the Weatherby Magnums to finally decide on the 7mm. magnum. Seller: Cabelas Grand Junction . for the .300 Weatherby Mag. is coming at you, just try to keep your eye open to shoot through the shot. It is a 7mm Weatherby Magnum and has a 26in flutted barrel. The 7 mm Weatherby mag is my favorite for two reasons. GI#: 101597518. MkV 340 Wby MkV 375 Wby x 2 MkV 378 Wby MkV 416 Wby 1899 Ithaca Hammerless ... a couple of friends that have a 7mm STW and a 7mm RUM - they are pretty overbore and honestly, the 7mm Remington Mag or 7mm Weatherby Mag are about perfect for the .284 bore size. The 338 Lapua has a case capacity of 114.2 gr of water, while the 340 Weatherby- 98.0 gr, 338 Remington Ultra Mag- 113 gr., and the capacity of 338-378 Weatherby is 125 gr. .340 Weatherby Magnum. Refine by Caliber: 7mm Win Short Magnum ... Refine by Caliber: .340 Weatherby Magnum .348 Win. Mag to the 30-06 when using them on elk. 7mm Remington Ultra Mag (154 grain at MV 3260 fps) - 55.3.300 H&H Magnum (180 grain at MV 2880 fps) - 55.5 270 weatherby Mag 7mm Remington Mag 7mm Weatherby Mag 7 STW 7mm Remington Ultra Mag 300 H & H 300 Winchester Mag 300 Weatherby Mag 300 RUM 303 Brit 8mm Remington Mag 338 Winchester Mag 340 Weatherby Mag 338 RUM 375 H & H 375 Weatherby 375 RUM 416 Remington Mag 458 Winchester Mag 458 Lott Long actions with a bolt face .Dia … Area Code: 970 . The wby cartridges from 240 up to 7mm are not overly punishing at the range as most people believe due to weatherby's reputation. I read an article years ago in Deer and Big Game Rifles called The Magnificent 7, which compared the 7mm Rem. 250-300fps. The Lazermark model is sophisticated yet traditional. When you know 50 Ft-Lbs. 265 grains, 2725 fps, .778 BC. .350 Rem. Calculations were corrected to standard temperature … This Weatherby is a freight train disguised as a rifle cartridge. The 7mm Weatherby has almost identical case capacity to the 7mm Remington Magnum. The 257, 270, and 7mm Weatherby magnum cases are shortened from the big magnum length of 2.825 inches (or thereabouts) to 2.549 inches (again, or thereabouts). 7mm Rem Magnum. This case is used for the 300 and 340 wby mags. 7mm Remington Magnum (175 grain at MV 2860 fps) - 53.3.30-06 Springfield (220 grain at MV 2410 fps) - 54.6.45-70 Government (405 grain at MV 1330 fps) - 55.0. Vs. 50+ Ft-Lbs. $1,199.99 ... Weatherby ~ Mark V Accumark ~ 7 mm Remington Magnum . I think it is all a mind thing. It was developed in the 1940s by Roy Weatherby.The 7 mm Weatherby Magnum did not get a lot of exposure until the early part of the 1950s when the Weatherby … Refine by Caliber: .348 Win. It makes 1693 ft-lbs (best in test) and 1696 fps at 1000 yards. 7mm Weatherby Magnum (154 grain at MV 3260 fps) - 55.3. Drop at 1000: 186 inches. The 300 wby is based on the full length 300 H&H case which requires a longer action. 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