The road to the famous Remington 700 rifle was paved with classics like the models 725 and 30s. The Speer Grand Slam is a premium bullet but after having had several bad experiences with this bullet I cannot recommend its use, especially at .378 Weatherby velocities. This cartridge was also used as Weatherby’s base for the design of the .460 Weatherby. And so it happened that Uncle Sam got its ultra-velocity cartridge and Roy Weatherby picked up a bit of extra money. The 215 magnum rifle primer was developed by Federal specifically for this round. Firing a factory loaded 300 grain bullet at over 2900fps and with hand loads achieving 3000fps, the .378 Weatherby was and remains a truly potent cartridge. Thread starter hjl; Start date Mar 21, 2007; Help Support Long Range Hunting : Join the LRH Team or . From muzzle velocities of around 2900fps the two loads will hopefully work very well together. For the sake of marketing a belt was added to the .416 Rigby case which, combined with the double radius shoulder, gave it a true ‘Weatherby Magnum’ appearance. But to utilize it the hunter must get past the initial grandeur of high power and see it for what it really is. Hornady have just now (Oct 2017) released their 300 grain round nose bonded DGX bullet. hjl . .222 Remington Rifle Cartridge – Family Portrait, Browning's New X-Bolt Max Long Range Rifle, Performance Center-Thompson/Center LRR Review, .300 Win. Sierra’s 350gr SMK is designed for target shooting only. I would imagine so, I think the Weatherby calibers are known to be accurate. Bella Twin, the .22 Used to Take the 1953 World Record Grizzly, and More; The Big, Bad-Bore .30-378 Weatherby Magnum Strikes Again; NBCI’s State of the Bobwhite 2018 Reports 24% Increase in Managed Bobwhite Acres Over Last Year Mag. But with a BC of only .429 this can be difficult in higher winds. It went on to become standard in Weatherby ammunition, not only in the .378 Weatherby Magnum, but later in his .460, .416 and .30-378 magnums as well. The.338-378 shoots a little flatter than the.340 Wby. The.338-378 Weatherby case holds 137 grains of water compared to the.338 Lapua, which holds 114 grains of water. Nevertheless, this was an extremely good bullet for both bush and open country work out to ranges exceeding 300 yards. Growing up with Weihrauch air rifles, I was spoilt with a quality Rekord trigger from an early age, and really appreciated the two stages offered by the design. Between 2400 and 2200fps (330 yards) wounds are wide but we may see a slight delay in killing. vs .300 PRC — Cartridge Clash, .45-70 vs .450 Bushmaster — Cartridge Clash, Ruger Launches New American Rifle Predator in 6.5 Grendel, Mossberg Patriot Predator 6.5 PRC Rifle Review, Black Hills Evolution of Rifle Cartridge: .308 Win. The utter ridiculousness of this is truly amazing. The two Partition bullets can each be put to good use in the .378 Weatherby. Velocity ratings for those three bullet weights are 3,500, 3,420 and 3,160 fps, respectively. Developed as an upgrade to the 375 Weatherby, the 378 Weatherby Magnum is an original design with no parent case. David Fortier talks with Jeff Hoffman of Black Hills Ammunition about the evolution of the .308 Win. Body weight resistance must be high and shot placement must be sound. And again, shot placement is the key. Copyright © 2007-2017 Terminal Ballistics Research, Ballisticstudies.com, Achieve success with the long range hunting book series & matchgrade bedding products, MatchGrade Synthetic Stock Stabilizer instructions, The Practical Guide to Long Range Hunting Rifles, The Practical Guide to Bolt Action Rifle Accurizing & Maintenance, The Practical Guide to Long Range Hunting Cartridges, The Practical Guide To Long Range Shooting. Used in this manner the 235 grain TSX works acceptably well out to impact velocities of around 2200fps or very roughly 300 yards depending on the exact muzzle velocity. I would love to have a .30-378, it seems like a giant .22-250, in the reloading manuals I have they say you can load a 110 gr. The TSX performs admirably when used in this manner and really brings the .378 into its own. The 350 grain Woodleigh is designed to be used at impact velocities no higher than 2500fps. This was introduced as a Weatherby proprietary cartridge in 1953. Weatherby have done well to adopt the 270 grain TSX for the .378 which produces a good balance of wounding versus penetration on heavy game. Add To Wish List. It also spawned an entire family of cartridges. If not for interest in the cartridge by members of the Original 1,000-Yard Benchrest Club in Pennsylvania during the 1960s, the .30-378 magnum would most likely have faded away. Between 2200 and 1800fps (570 yards) shot placement must be sound which can be hard to guarantee with a BC of .4 in high winds. Like any cartridge that consumes huge charges of powder for its bore size, the .30-378 magnum will burn out a barrel in fewer rounds than will a much smaller cartridge. But again, I like to push the envelope a bit. Beyond 220 yards this bullet is best suited to large bodied non-dangerous game which offer plenty of body weight resistance to aid expansion and hydraulic wounding. These are most suitable for large bodied deer or antelope out to ranges of around 400 yards. There is a small risk of petal loss when the GMX is used in this manner though this makes little difference to its performance. Brandon Mason August 18, 2016 Gear, Rifles 20 Comments 8,541 Views. Beyond its role as a heavy game load the Barnes works well on other large bodied game such as bear and moose. Furthermore, very few hunters have an interest in chasing very high velocities with light pills. During the 1960’s, U.S gun writer Elmer Keith and Bob Thompson created the wildcat .338-378 by shortening the .378 case slightly and necking it down to .338”. Wby Ammo .378 Weatherby … Too often I hear of hunters speaking about the large target area of heavy game, advertising their lack of skill to all who will hear. The next challenge came in the form of internal ballistics. The spirited discussion lead to an understanding that both trains of thought have validity and many rounds and calibers can do the job on western big game. Your review * Name * Email * You may also like… Mark V® Accumark Elite $ 2,799.00 – $ 2,999.00 Select options; Mark V® Accumark. But barrel life with this cartridge can be longer than some would have us believe. To achieve consistency Federal designed the No.215 Magnum primer specifically for the Weatherby magnum. Overnight it became the best-selling cartridge in that rifle, a position it held onto until 2008 when it was nudged into a close second place by the .257 Weatherby Magnum. But when all is said and done both perform in much the same manner relative to the strengths and limitations of homogenous copper projectile design. Options from Sierra include the 200 grain flat point (designed for the .375 Winchester), the 250 grain Gameking, the 300 grain Gameking and 350 grain Matchking (SMK) for long range match (primarily used in the .375 Cheytac). Projectile construction is another factor as this cartridge can place a great deal of stress on projectiles. Below 2200fps and through to 1800fps (680 yards) shots must be kept well forwards in order to ensure clean killing. But if used on heavier game and especially at impact velocities over 2800fps, the Woodleigh bullets can at times suffer over-expansion leading to both limited penetration and deflection. Mar 21, 2007 #2 S. screech Well-Known Member. Its all case capacity period to get velocity then bbl legth. Many would disagree, I could care less what they think. The .338-378 Weatherby Magnum started out as the wildcat cartridge, .338-378 Keith-Thomson Magnum during the early 1960s.Keith and Thomson are Elmer Keith and R.W. Therefore, while it can be enjoyable to push the limits, hunters must apply caution. The 338-378 Keith-Thomson Magnum is a quarter of an inch shorter than the full length 338-378 Weatherby Magnum, this was because they thought it was better balanced with the slowest powder generally available at … The 250 grain Gameking features a jacket nearly twice as thick as other Gameking bullets along with an extra tough core. Instead it often does its best work on large bodied deer and antelope and although there is ample scope for this, it is still somewhat of a shame that Speer do not produce a true light to medium weight game bullet for .375-08 and .375-06 users. While this load is acceptable for hunting large bodied deer readers are advised to refrain from using this projectile on heavy game. Mag and .338 Lapua, which are $2,700. Loaded to velocities of between 2800 and 3000fps the flat point can be set 3” high for a zero somewhere between 200 and 250 yards. But to utilize it the hunter must get past the initial grandeur of high power and see it for what it really is. Mag. Through the years I have worked with four different rifles in this cartridge, and only one of them was incapable of exceeding 3,400 fps--and that one had slightly undersized bore and groove diameters. Although the Weatherby company have released their cartridges from proprietary status it is rare to find another maker of .378 brass purely because of its unique case dimensions. The .222 Rem. On heavier game a homogenous bullet can prove more effective. Some show the cartridge topping out with a 180-grain bullet at 3,300 fps while others give it another 100 fps or so. Additional chamberings include many of Weatherby’s own proprietary magnum cartridges like the 7mm Weatherby Magnum and 30-378 Weatherby Magnum. All are generally true to or within an acceptable range of their stated velocities. Arguably the most interesting option is the new 6.5mm Weatherby RPM. Match. Those who panic and pull the trigger under threat will do so whether the trigger is 4lb or 2lb. But again, wind drift is a concern. Those who wish to push this further need to understand that the Speer can really struggle to produce any form of expansion between 1800fps and 1600fps (800 yards). $1,479.99 - $2,159.99 . To say otherwise only highlights the inexperience of the hunter. Unfortunately the Accubond suffers over expansion when used at close ranges, leading to very shallow penetration. The cartridge can hold upwards of 7.13 g (120 gr) of powder.The 378 Weatherby Magnum cartridge also … To make the most of this performance both the shooter and rifle need to be accurate (regardless of the supposedly large target area of heavy game). Readers are also asked to avoid any magical high weight retention bullets that supposedly dump maximum energy yet retain 100% weight, defying physics without a shred of common sense. And since the 215 primer is available from Federal as a reloading component, it is the logical choice for handloads as well. The heavier the bullet and the further away we can be above an impact velocity of 2600fps the more noticeable this becomes. Back in 1996 I spoke with Chronister about his accomplishments in 1,000-yard competition and asked him how often he replaced the barrel on his rifle. The next important chapter in the life of the .30-378 magnum came later. Despite its unusual nomenclature, the .378 uses standard .375" bullets. In EHJ’s 2016 June/July issue Dan Turvey, Jr. and I debated the merits of .30 cal vs. sub .30 cal rifles. 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; 9.3x64mm Brenneke Load Data; 375 Holland & Holland (H&H) Magnum Load Data; 375 Ruger Load Data ; 378 Weatherby Magnum Load Data; 375 … |   Both work well on large bodied deer or antelope weighing up to 600kg (1300lb). If the Gameking is forced to penetrate through more than a foot of tissue and bone combined with high impact velocities it sheds a great deal of energy. Of the available designs the 270 and 300 grain bullets have great merit for use on game weighing over 450kg and up to 900kg (2000lb) while the 350 grain bullet is best reserved for the heaviest of game. Weatherby's.30-378 is the.378 Weatherby Magnum necked down to.30 caliber and can drive a 180-grain bullet in excess of 3,400 fps. Next Post There’s no doubt that Remington’s 700 is the champ, the long-time gold standard in bolt action rifles. The stunned mullet look has no place in this game. Speer bullets include the 235 grain semi spitzer Hotcor, the 270 grain BTSP and the 285 grain Grand Slam. Sometime later, the availability of an extremely dense propellant with an even slower burn rate increased velocity to just beyond 6,000 fps. It was an original belted magnum design with no parent case, inspired by the .416 Rigby and headspacing of the belted .375 H&H Magnum. Abide by those three rules and you can live happily ever after with Roy Weatherby's biggest .30 caliber cartridge. The.338-378 Weatherby cartridge uses the.378 Weatherby case, necked down to take a.338 bullet. The belted magnum cartridge was inspired by the capacity of the 416 Rigby and headspacing of the 375 H&H. Rifle Shooter Digital Staff - April 11, 2019. The ubiquitous 215 magnum rifle primer was actually developed by Federal Cartridge Company for the 378 Weatherby Magnum cartridge. This bullet is not designed to be used at impact velocities over 2400fps, but provided it is not used on heavy game, produces exceptional results. Buy a 378 weatherby online. From an easy muzzle velocity of 3200fps the Hotcor is an emphatic killer of medium game down to an impact velocity of 2400fps or around 250 to 260 yards. Discuss this article or ask a question on the forum here Sell your 378 weatherby for FREE today on GunsAmerica! The .378 achieves Roy Weatherby’s goals in every way. Those who hunt in mountainous terrain where ridge to ridge shots are to be expected will greatly appreciate the heavy Sierra bullet. For hunters contemplating building a custom .378, a straight and fat varmint style stock is the key along with a light and crisp trigger. Nevertheless, there are some limitations. 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