World's most popular community & resource for hunting in Africa. Mag and enjoys a cult-like following. Hit like Thor's hammer without the sharp kick of the .300 magnums. Dette er ytelsesmessig en svært så godt konstruert patron, noen sier at den er den beste patronen fra Weatherby ved at den har ett godt forhold mellom kaliber og hylsevolum. 250 gr. Die .340 Weatherby Magnum entwickelt einen wirklich harten und unangenehmen Rückstoß, vor allem wenn sie aus normalen Jagdbüchsen wie der Weatherby Mark V verschossen wird. The last caliber to use that casing was the .340 Weatherby Magnum. It's too tight of a squeeze for me. It is quite a violent round and I've seen it damage lots of meat. Unfortunately, I got rid of mine a few years ago. Greetings Weatherby fans! 340 Weatherby . Had it since 1988 and love it. I've had at least one of these, a very pretty custom Ruger #1 in .340 W. I didn't understand the concept at all. Source(s): Weatherby 1 The .340 Weatherby Magnum rifle cartridge was introduced in 1963 by creator Roy Weatherby in response to the .338 Winchester Magnum.1 The .340 Weatherby Magnum uses the same .338 in. 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. The accuracy is still acceptable but less than it was when it was new and over a chronograph the velocity has fallen to about 100 f/s slower than it did when it was new with the same loads. SKU: N/A Category: Custom Ammunition. Shooting the Weatherby TRR rifle in .30-.378 at 880 yards on the Flying B ranch rifle range in Idaho. The 340Wby really shines with the 240 and 250 grain bullets and is nothing to sneeze at when it comes to the 300gr bullets. Weatherby rifles chambered for Weatherby Mag calibers often have excessive freebore, approaching 1". In fact when the Phs in AF asked what I was shooting I replied a 340. Mag. Weatherby brass and the Federal 215 primers were used throughout the following loads. If you compare the .340 and .338-378 Weatherby Magnums shooting the 225 grain Barnes TSX bullets there's a noticeable difference in the ballistics. Weatherby brass and the Federal 215 primers were used throughout the following loads. Out side temps and whether ammo has been sitting in the sun or  hot gun for any length of time. Worked great with only three bullets not making exit and those were under the far hide. Hunt safe y'all! I was just shooting it yesterday, and shot a half inch group in 80 degree temps. I like the Barnes 225 TTSX out of my .340 Weatherby for Elk. AccuBond at 2941 fps. You might need several cleanings but I bet it helps. In other words why waste the money on a new barrel until you actually know for sure the condition of the old one. However, Roy took advantage of the longer case to pack in more powder for greater velocity. This includes some good cartridges that are not often found in heavy barrel rifles from the factory, such as one of our favorites, the classic 30-06 Springfield. so not necessarily the most meat friendly cartridge arond, but it is one hell of a stomper. This is his elk rifle. Our favorites for 340 Weatherby Magnum ammo are: Barnes 210gr Tipped TSX & 250gr TSX & Tipped TSX, Nosler 225gr Accubond, Swift 225gr A-Frame. It's illegal for use on dangerous game since it's a .338 bullet. I sent them my barrel and action and they will install the new barrel true the action and lap the lugs all for that price. I used to have a .340 WBY. Mag. When I was a kid we used to put a cardboard insert inside a old car tire and have a friend drive it to the top of a hill. This particular ammo was discontinued by WBY. The .340 is Roy Weatherby’s answer to the .338 Win. having a rifle that will put a heavier bullet dead on at 100, and a lighter bullet high enough to give a good point blank range is certainly an asset. This data is now available to download for free from our website! Supposed to be a joint venture with Proof Research. I do believe we  get too much involved with accuracy on paper as opposed to "kill zone " on applicable critters. 340 Weatherby Magnum The cartridge on the left is the 340 Weatherby Magnum with a 338 Winchester Magnum on the right for comparison. 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. When the barrel on my 257 is ready to go I'll be replacing it with a carbon Proof Research to cut some weight. I now have a .338 RUM which is about the same ballisticly. My rifle is a remington 700 in the 257 and I got Pac Nor super match grade barrel put on it. Although not legal in most of Africa for DG ,from my experience is that this round with proper bullets would be pretty much a clone of the .375 on something like buffalo. It's not expensive, but you need a competent gunsmith that knows what he's looking at not some fly by night person that say's he can. I am looking for a Safari Express. As others have recommended clean all the copper out of the barrel and have a GOOD gunsmith run a bore scope down the barrel and get his opinion as to what the actual condition of the leade and rifling is. The rifle is a warranty replacement for another 340 that wouldn't group and was pulled by the weatherby custom shop. I was fortunate and successfully bid on a couple hunts for plains game in SA later this year and next. Had it since 1988 and love it. He then would send it down while we would try and hit the cardboard. It is my all time favorite North American big game cartridge. I have taken animals from 10 yards out to just under 800 yards and have never recovered a bullet and all the animals were dead with a single shot, however a few elk have taken more than one just for the reason of "if he is still standing I'll keep shooting.". Add to cart. Weatherby Magnum chambers have “freebore,” meaning they have a longer throat. Quote from: Lloyd on January 08, 2017, 11:33:40 AM. Absolutely amazing cartridge and criminally underrated. 100 and the 225s 1 1/2 in high at same. 340 Weatherby Magnum Powder Minimum Maximum Charge (grains) Velocity (fps) Charge (grains) Velocity (fps) IMR 4350 75.5 2601 80.5c 2774 H4350 73.0 2592 78.0 2739 RL 19 80.0 2641 85.0c 2813 Viht N560 84.0 2689 89.0c 2847 IMR 4831 78.0 2617 83.0c 2791 MagPro 86.0 2714 93.5c 2825 *RL 22 82.5 2679 87.5c 2835 IMR 7828 SSC 82.0 2612 87.0c 2804 Powder Mag., which I have hunted with extensively, and it topped the chart in the .33 Nosler. Way back in the olden days, when Elmer Keith lived seven miles north of Northfork, Idaho, some 30 miles north of Salmon, he and a couple of friends developed a cartridge they called the 334 OKH. If you don't care where you are, you are not lost. A good second choice would be the Swift A-frame in 225 grains. Weatherby is also offering a Mark V CarbonMark that has a carbon fiber barrel. It is quite a vicious round, one of the only problems I have ever seen with it is meat damage. It's flat shooting, but the recoil is so sharp 99% of shooters won't be able to shoot such a recoiling beast at a level of precision that would give you the long reach desired...because it kicks that much. Bullet weights for the .257 Weatherby range in weight from 75-120 grains, with the most popular for big game hunting weighing 100-120 grains. I'd think any competent smith who has ever done any rebarreling at all could handle the task. My 340 Weatherby shot a 250 grain bullet 2,948 feet/second all day long. It is based on the .300 Weatherby case necked up to accept .338" bullets. 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; … Majority of people who hunt have a.257 WBY,.270 WBY,.270,,... This is how they are able to achieve their velocity claims, but is! American big game rifles out on rabbit hunts nearly the fastest or nearly the fastest or the. Replied a 340 that should be hunted with a.340 halfway through his career, again never a lost.... Started gaining traction in the.338 Winchester Magnum a rare Native Texas ( generation! 'S hammer without the glass on top 's a.338 rifle, what you are, you are in. Case necked up to accept.338 '' bullets in 340 weatherby accuracy at same like! 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