All have shot sub .05 moa with a little development 3 will shoot .025 moa for 5 shots. Although, even the least powerful here (.338 Win. Finally, the gory details. They provide more performance than most hunters will ever need. AccuBond at 3060 fps. It will feed from a standard magnum action with high BC bullets and give you almost identical performance as the 338 Lapua Mag. Weatherby has developed several rounds by necking down their awe-inspiring .378; the .300-378 and .338-378. Not that you should have any problems feeding the 338-378’s double radius shoulder case from a more typical bolt action rifle either. These are both big, long rounds that feel more like artillery than a rifle. it's illegal to own a firearm chambered for any military used cartridge, so the .338 lapua magnum and the .408 cheytac are illegal, but thee 460 weatherby might be legal as I said, any round not being used by the a military is legal for the laws I've seen. Olight Black Friday Sale : Nov 28th – Dec 2nd Click Here : https://olight.idevaffiliate.com/idevaffiliate.php?id=210 PL-Pro Black/Desert Tan. Claims 20 rounds down the tube. The main factor is to know the maximum and minimum anticipated impact velocities and the intended game, then select a bullet which is reliable under those conditions. AccuBond (.720 BC/.375 SD) at 2650 fps. Any rifle firing these rounds with a muzzle brake will require hearing protection worn even while hunting, while unbraked models will come with gobs of punishing recoil. .338 diameter bullets are unique. The author acknowledges hand loaders can achieve much better performance in many instances. The .338 Lapua Magnum was initially grounded on a .378 Weatherby Magnum case, necked down to accept 0.338-inch (8.6 mm) bullets because this diameter presents optimal sectional density and penetrating capabilities. My 28” #3 contour barrel is hand-lapped, free-floated and cut-rifled to extract top velocities and energy from .30-378 Weatherby Magnum, .338 Lapua Magnum and .338-378 Weatherby Magnum chamberings. *.338 Lapua features a Chrome Moly barrel GUARANTEED SUB-MOA ACCURACY All Mark V® rifles are guaranteed to shoot a 3-shot group of .99” or less at 100 yards (SUB-MOA) from a cold barrel when used with Weatherby® factory or premium ammunition within Two-Years of Verified Purchase Date to Original Purchaser. Here’s how each cartridge ranked. If you’re looking at these two rounds, the 338 RUM and 338 Edge are both worth looking at as well, but for today, I’ll just be focusing on the Lapua and Weatherby 338… They push 300gn bullets at … These close to one-ton beasts are often shot at ranges beyond those recommended for other dangerous game animals due to the open terrain common to coastal Alaska and Kodiak Island. The .338 Lapua Magnum was developed in the eighties specifically to provide Military snipers a round capable of delivering high powered impacts to targets at extended range. Muzzle velocities are the nominal industry standard for the tested bullet weight in each caliber. Detailed performance figures are summarized in the table at the article’s end. Military acceptance of the 338 Lapua as an extended range sniping round has increased civilian interest and now there are lots of tactical and hunting rifles becoming available in 338 Lapua. Remember that Weatherby rifles traditionally have longer free bore to keep pressure down, which can be detrimental to top accuracy. It also comes with some extra recoil but with rifles at this point, who’s counting? These genuine magnum Mausers are indeed expensive and not available off the shelf in most gun stores. The.340 Weatherby Magnum makes about 100fps less velocity than the Lapua, but with 15-20% less powder..338 Weatherby fires a 160gn at 3600fps, the Lapua at 3500fps. The .300 Win Mag vs .338 Lapua Magnum is an interesting comparison, and we think provides some interesting points of discussion. These rounds do have one mission they are ideal for, though: Alaskan brown bears. This put some cartridges at a disadvantage since only factory advertised velocities were used. The .338 Lapua Magnum (8.6×70mm or 8.58×70mm) is a rimless, bottlenecked, centerfire rifle cartridge. (L-R) Nosler Partition, Nosler AccuBond, Sierra Game King. Comes with dies and some brass plus a Leupold VX 111 3.5-10x40mm for a $1,000 bucks . Here’s one funny thing about Weatherby, they’re chambering a lot of their rifles for both 338-378 AND 338 Lapua. Imagine a bullet arcing through a six-inch diameter pipe for a certain distance. As a big bad round capable of taking big game from a distance, it’s growing in popularity faster than the 338-378 Weatherby, and in the near future it looks like it’ll become the more popular choice. They deliver sufficient energy well beyond the range where the bullet decelerates to 1800 fps. If a person cannot tolerate a particular cartridges un-braked recoil, they need a different cartridge which they can manage without subterfuge. All calculations were based on the heaviest Nosler AccuBond™ bullet available in factory loaded ammunition for each caliber, unless otherwise noted. 338 Norma. Here’s what you need to know about the 300 Win Mag vs 338 Lapua vs 338 Win Mag. I’ve sent hundreds of rounds of 340 Weatherby down Question: Why would Recoil even be considered in a .338 caliber? The AccuBond™ is a good all-round hunting bullet with high ballistic coefficients (BC) and terminal performance similar to the time tested Nosler Partition™. One point for every 25 yards beyond 200 yards for minimum expansion velocity range, one point deducted for every 25 yards less. Mag. In some cases, there was either no AccuBond load available for a particular cartridge or the only one available was lighter than those for other rounds. As yet, no one offers a 250 grain AccuBond in factory ammo for the 33 Nosler, and it would have scored closer to the .338 RUM with a 250. Muzzle breaks are a cheat; they produce excessive back blast and flash which both deafens and blinds (in low light) a shooter. They possess both high ballistic coefficients (aerodynamic efficiency), high sectional densities which allows them to penetrate deep into large, heavy animals, and considerable weight which also promotes penetration and energy transfer. Just don’t expect those slugs to hold up if they hit a bull elk’s shoulder at fifty yards. It comes close to .338 RUM performance but fits into standard (.30-06) length rifle actions. However, a true magnum Mauser action will accept the longest magnums, such as the .416 Rigby which is 3.75 inches long. MPBR for a 10 inch kill box illustrates the concept. I'd stick with the Lapua. Mag. The Lapua comes with a case capacity of 114.2 gr of water, while the 338-378 Weatherby holds 9.5% more at 125 gr of water. My personal choice? Recoil has a direct effect on most shooter's accuracy--the more recoil, as a general rule, the less accurate the shooter. 250 gr. Expanded Nosler AccuBond recovered from test media. 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. They are all good, if you can tolerate the recoil. Answer: Yes, if your loads used the same bullets at the same velocity as those in the article. Great article. Keith and Thomson are Elmer Keith and R.W. The .338-378 Weatherby Magnum started out as the wildcat cartridge, .338-378 Keith-Thomson Magnum during the early 1960s. Brilliant writing. Another fun game of round comparison, this time pitting the ferocious 338-378 Weatherby Magnum and the military favored 338 Lapua Magnum. The 338-378 Keith-Thomson Magnum is a quarter of an inch shorter than the full length 338-378 Weatherby Magnum, this was because … The .338-378 has devoted fans in the long-range hunting sub-culture, but only exceeded the .340 Weatherby’s muzzle velocity by 119 fps; a small reward for the huge recoil it produces. Driving a 250-grain bullet to 2940 fps, for over 4,800 ft.-lbs. The 338-378 was not designed with accuracy in mind. Calculations were corrected to standard temperature (59F/15C) and pressure (29.92 inHg/1013 mbar) at sea level. A hunter must really want to shoot an elk at 800 yards to consider anything above the .338 Win. Recoil calculations were based on a nine pound rifle weight. The mere 10% difference between the two cases is not much, but the difference in style of rifle is great. Always consult with the bullet or ammunition manufacturer as to your needs before you choose. Mag, the “softest” here, slaps the shooter as hard as a .375 H&H Magnum, while the .338-378 and .338 Lapua are close to .416 Rigby territory. Answer: Recoil is a consideration with any cartridge. Can … As a result of this, it became more widely available. Despite their “Thor’s Hammer” performance, .338 magnums are not as popular as their .30 caliber cousins for one big reason: recoil. Both BC and sectional density (SD) are noted for each bullet tested. The newest .338 magnum, the 33 Nosler arrived on the market in 2016. I own 5 Weatherby Accumarks and traded another. The .340 is Roy Weatherby’s answer to the .338 Win. 250 gr. These are good bullet choices for shots inside 500 yards: Barnes TSX/TTSX, Swift Scirocco, Swift A-Frame, Nosler Partition, Nosler AccuBond, Nosler E-Tip, Woodleigh Weldcore, Hornady GMX, Hornady Interbond, and North Fork. I think most hunters would agree that the .300 Winchester Magnum, .338 Winchester Magnum, and .338 Lapua Magnum rounds are serious These days, it’s very different. If you’re looking at these two rounds, the 338 RUM and 338 Edge are both worth looking at as well, but for today, I’ll just be focusing on the Lapua and Weatherby 338’s. Which cartridge to go for is largely a question of rifle. Therefore, a cartridge with less recoil than another, but with similar terminal performance, is better for the simple fact a missed shot, no matter how powerful, is useless. 300 gr. Trajectory in this test is defined as Maximum Point Blank Range (MPBR): the distance over which a bullet rises three inches above sight line and then drops three inches below to hit within a six-inch kill box. The.338-.378 Weatherby makes about 100-150fps more velocity than the Lapua, but with 10-15% more powder. It has the case capacity to launch the heaviest .338 caliber bullets (300 grain) at useful velocities and is a stellar long-range cartridge for large game. I know I'm going to get flak for this, but it's true to an extent. If, however, true long-range hunting is anticipated, they will all benefit from the specialized long-range bullets now on the market which expand well below 1800 fps. "Bob" Thomson. If the minimum energy range exceeds the minimum expansion range, the minimum expansion range becomes the maximum effective range since unexpanded bullets are much less effective regardless how much energy they possess. The .460 Weatherby Magnum is a belted, bottlenecked rifle cartridge, developed by Roy Weatherby in 1957. .375 H&H Magnum (L), .338 Winchester Magnum (R). While waiting on its return, I've been pondering the 338 lapua improved chambering. AccuBond at 2941 fps. Question: Do you think a Remington 700 is expensive? Mag) hits the expansion limit at almost 600 yards! (L-R) .308 Win., .340 Weatherby, 9x19mm Luger. All things equal (they seldom ever are), I’d go with the .338 Win. The .338 Winchester Magnum derived much from work done by ballistics pioneer, Elmer Keith, among others. Indeed, the 338 Lapua was made with semi-automatic firearms and their careful feeding requirements as a consideration. Use the right tool for the right job. Their superior sectional densities combined with high velocity and bullet weight anchor these killer bears like few other cartridges. For shots well beyond 500 yards, consider the Nosler AccuBond LR, Swift Scirocco, Berger, Hornady ELD-X, Hornady SST, or Sierra Game King. Like the .338 Lapua, it is a great candidate for the 300 grain long-range bullets now on the market. One point for every 25 yards beyond 200 yards (the average distance most game animals are shot) for maximum effective range on medium and large game, respectively, and one point deducted for every 25 yards less than 200 yards. One point for every 10 yards MPBR beyond 200 yards and one point deducted for every 10 yards less. Another fun game of round comparison, this time pitting the ferocious 338-378 Weatherby Magnum and the military favored 338 Lapua Magnum. Hmmmm, Nosler bullets and Nosler winner....just saying. Question: I'm curious why you chose to use different weight bullets for each cartridge? Adriel has been hunting all his life, enjoys shooting 3 gun, is a trainer for Project Mapleseed and tries to apply a practical point of views to his reviews. All the others require expensive magnum-action rifles (except 33 Nosler), hit you like a five-pound ball-peen hammer, and require slavish devotion to find ammunition. Mag and enjoys a cult-like following. One point for each ft-lbsf recoil less than 15, and one point deducted for every ft-lbsf greater than 15. Case availability on the 338 Lapua is OK, with fantastic quality Lapua cases fairly readily available. In a similar manner to the .338 Lapua, the .338-378 employs a full .579” diameter case rim rather than a standard magnum rim diameter of .532” as is The heaviest bullet available would give each cartridge its best chance since such bullets offer the highest BC's and SD's and would thus make the comparison as fair as possible. Thank you, sir! Effective range in this test is the minimum impact energy recommended for a humane kill on medium game (1200 ft-lbs.) If you’d have picked up a catalog from Cabela’s 5 or 10 years ago, you wouldn’t have seen any 338 Lapua rifles listed but you may have seen the Weatherby. They offer not just raw violence (at both ends of the barrel) but also flatter trajectories than the big-bores and consummate accuracy. This combination is the goal Winchester’s designers had in mind when they introduced the first production .338 magnum in 1958. bullet. Functionally, it doesn’t matter a whole heck of a lot, but it can be a bit more troublesome when it comes to reloading the cases. While there is some overlap in the applications of these rounds, there are also going to be certain shooting situations where one might be better suited than the other. Numbers obtained from Federal (338 Lapua) and Weatherby (338-378 Weatherby), 338 Lapua with 250 grain bullet: 2950 fps at the muzzle, 338 Lapua with 300 grain bullet: 2580 fps at the muzzle, 338 Weatherby with 250 grain bullet: 3060 fps at muzzle. Specialized long range bullets were not used as they are unnecessary for most hunting situations. AccuBond (.550 BC/.281 SD) at 3025 fps. As to the muzzle break comment, I have yet to see a rifle around here with a muzzle break. The following ammunition cartridge ballistics information and chart can be used to approximately compare .270 Winchester vs .338 Lapua Magnum ammo rounds. Upon making further improvements, the finish manufacturers made the .338 Magnum rounds compatible with semi-automatic weapons. Bullet selection for the .338 magnums presents some challenges. What does that extra 10% case capacity buy you? proved good enough for old Elmer Keith, it’s good enough for me. 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