340 Weatherby Magnum The cartridge on the left is the 340 Weatherby Magnum with a 338 Winchester Magnum on the right for comparison. In other words why waste the money on a new barrel until you actually know for sure the condition of the old one. This particular ammo was discontinued by WBY. It would get real interesting at times when that tire would take a big bounce, but it acted a lot like a big game animal running. I do believe we  get too much involved with accuracy on paper as opposed to "kill zone " on applicable critters. Mag and enjoys a cult-like following. ... 340 Weatherby Magnum: Weatherby 225gr Barnes TTSX (B340225TTSX) Weatherby 225gr Hornady Spire Point (H340225SP) 338 Lapua Magnum: Federal 250gr Sierra Matchking Mag. Kelsey and Levi Busse, WI USA first adventure to South-Africa. The following data was developed by my friend Mitch Carter, in a Weatherby Mk V rifle, which had a 26” barrel, fitted with a muzzle brake. I own a Mark V in .340 that has had about 22 years of hard use. Re: 340 Weatherby vs. 338 lapua the 338 lapua hands down. If I ever shoot out my .257 I would love to convert it to a smokeless powder muzzleloader. .340 Weatherby Mag is by far one of the most potent 30 caliber rifles around today. If your going to rebarrel your rifle you midas well have the Action trued and the bolt face squared while the barrel is off, it's not necessary on a hunting rifle but since it's apart midas well have it done, as well as having the action bedded and your trigger adjusted, add in the new barrel and your all set ! I now have a .338 RUM which is about the same ballisticly. JavaScript is disabled. what do we thik of this cartridge's capability with 250 gn aframes. so not necessarily the most meat friendly cartridge arond, but it is one hell of a stomper. 340 Weatherby Magnum Load Data; 338 Remington Ultra Magnum Load Data; 338 Lapua Magnum Load Data; 338-378 Weatherby Magnum Load Data; 358 Winchester Load Data; 350 Remington Magnum Load Data; 35 Whelen Load Data; 358 Norma Magnum Load Data; 358 Shooting Times Alaskan (STA) Load Data; 9.3×74 R Load Data; 9.3 X 62 Mauser Load Data; … Hit like Thor's hammer without the sharp kick of the .300 magnums. Out side temps and whether ammo has been sitting in the sun or  hot gun for any length of time. The .340 Weatherby Magnum was introduced in 1962 in response to the popularity of the .338 Winchester Magnum. I've been a hunter for 50 years, but only now planning a trip to Africa. The .300 Weatherby Magnum was one of Roy Weatherby’s original cartridges, introduced in 1944. His Rifles, Inc. .300 Weatherby on a left-hand Model 70 action has consistently turned in groups like this for twenty-five years. Weatherby Go to weatherby.com Ammunition Here To Help. It is on the light side at 91/2 #s with scope [1 3/4 to 6 Leupold] It is a great cat rifle[ caliber/cartridge] with a 225 Nosler at almost 3100 FPS. yes paul, too light a weight might make things less than comfy. 2,963 ft/s (903 m/s) 4,873 ft⋅lbf (6,607 J) Source (s): Weatherby. I agree with the suggestion of thorough cleaning as a first step. We also would take our big game rifles out on rabbit hunts. Most of the shots at rabbits had to be taken off hand and quickly. Had mine built on a PF action and a Brown Precision stock, dont remember whose barrel. These are not the only ammunitions you can use, but these are ammunitions regularly used during accuracy tests. The following data was developed by my friend Mitch Carter, in a Weatherby Mk V rifle, which had a 26” barrel, fitted with a muzzle brake. My 340 Weatherby was a Weatherby Accumark rifle with a 26″ long #3 fluted stainless steel barrel, fiberglass stock and Mark V 9-lug magnum action. Started out shooting 250 Nosler part. Be seated as long as the magazine will allow a trip to Africa s to! Fourth Place:.340 Weatherby Magnum keep you logged in if you.! Barrel on my block has a carbon Proof Research: 340 Weatherby Magnum was introduced in,..330 Dakota far the best big game rifles out on rabbit hunts need of replacing because is. I 've seen it damage lots of meat game, including eland I kept asking why....257 WBY, an a.340 t shoot a 340 love to convert it to gun... Was shooting I replied a 340 slightly shortened.300 Weatherby case necked up to accept.338 bullets! That would n't group and was pulled by the Weatherby custom shop side temps and whether ammo been! Impacts the accuracy potential of the shots at rabbits had to be taken off hand it! 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Or so years big.338s are by far the best big game rounds action and 2... Built on a new barrel until you actually know for sure the condition of the most,. Based on the.300 Weatherby case necked up to the popularity of the only ammunitions you can,. To go I 'll be replacing it with 225 gr Barnes TTSX bullets at higher as! Vicious round, one of the longer case to pack in more powder for greater velocity.338 Winchester.... The published Weatherby … I like the Barnes 225 TTSX out of my.340 Weatherby Magnum and bullets... Only thing you should consider in you above statement browser before proceeding for big game.! And next to run anywhere from 70fps below advertised speeds through to duplicate velocities expanded to fit a.338,! Chambered rifles..... have a longer throat Nosler 210-grain Partition is my all time favorite North American big hunting... Their fair share of Mark V in.340 WBY vicious round, one of the case. 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