Founded by legendary hunter Roy Weatherby, Weatherby Firearms produces some particularly high-quality rifles like the Mark V and the Vanguard models. colorado. As for recoil, even out of my sub-six-pound MG Arms Ultra-Light, it is a mild push instead of a sharp crack like the .300 Wby., and it prints half-MOA groups all day long. 378 Weatherby Magnum Developed 1953 / Produced 1955 Designed to replace the 375 Weatherby Magnum, deep penetration and bone smashing power are the calling cards of the 378. AH elite. Hornady Superformance 162 gr SST was closest to … To be quite honest the 375 Weatherby is one of the milder ones and matches 375 H&H AI Ballistics. In spite of requiring a longer action, I feel the .375 H&H Magnum mates up with a 7mm or .30 caliber rifle a bit better than does the .338 Winchester Magnum. Most recent experience with factory loads (most of my guns never see factory ammo) is with a friend's 7mm RemMag. In the same way that the .340 is the .338 Win. The .378 Weatherby outshone the former cartridge and by 1960 the .375, though very useful in its own right, was made obsolete. It pushes a 300-grain Nosler Partition between 2,650 and 2,750 fps and delivers 5,000 ft.-lbs. The .375 Weatherby has been largely, but not entirely, superseded by the later .378 Weatherby. 30-378 Weatherby Magnum Produced 1996 The 30-378 was designed & tested in … BUY NOW. The .378 Weatherby cartridge was developed by Roy Weatherby based on a belted version of the massive 416 Rigby case necked down to .375”. Several noted gun writers have said this is the harshest recoiling cartridge they’ve ever fired. of energy. The .378 achieves Roy Weatherby’s goals in every way. The … Joined Nov 15, 2013 Messages 371 Location Texas. The recently introduced .370 Sako Magnum, actually a 9.3mm (.366"), was intentionally misnamed to appeal to the American market. Lastly, I must admit I was never impressed with Ackley. The .375 Weatherby Magnum and its big brother, the .378 Weatherby, offer an increase in velocity (500 fps for the big .378!) For the money I don’t think you can go wrong with it. Most hand loads are high pressure and most factory loads are far from it. Not counting wildcats and proprietary cartridges, we have: .376 Steyr, .375 Flanged, .375 H&H, .375 Ruger, .375 Weatherby Magnum, .375 Remington Ultra Magnum and .378 Weatherby Magnum.. Whats better and even whats the difference, 375 Weatherby vs the AI???? 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”. I think it’s a really nice rifle, it doesn’t have the cheap stock like the cheaper vanguards. B. bruce moulds. I'm not really asking which one is better. Ultra Mag, .376 Steyr and .375 Ruger. Yes, the .375 Ruger mirrors the ballistics of the H&H, and the .375 Weatherby Magnum, .375 Remington Ultra Magnum and .378 Weatherby all better the velocity; sometimes by over 400 fps, but at the cost of a severe increase in recoil and bullet strain. BUY NOW . Design and Specifications The .375 Weatherby Magnum is an improved version of the .375 H&H Magnum. Any Rifle Chambered in .375, .378, .416 or .460 Weatherby Magnum. The maximum cartridge overall length (COL) is also the same as the .375 H&H, at 3.60". Recoil Comparison of 450-400 Nitro Ruger No1 vs 375 H&H Sako Brown Bear. 20 November 2010, 07:18. Joshua 24:15 www.teamfaithfull.net / My granddaughter "Multitudes loose the sight of that which is, by setting their eyes on that which is not". Since 1955, the 378 has become one of the world’s most popular cartridges for the largest of big game animals. The Weatherby will do everything and maybe a bit more than the Ruger if that is important to you. I foubd a 375 Weatherby that I sorta liked and would like to hear a little more about them. The .375 Remington Ultra Mag (RUM) is based on a blown-out .404 Jeffery case slightly shortened to the same 2.850" case length as the .375 H&H Magnum. The .378 Weatherby is a larger case, being the .460 Weatherby or .416 Weatherby case necked down to .375. My understanding is that the Weatherby version of the 375 is a little more on the lines of the Ackley Imp version of the 375. Ballistics Velocity. 375 Weatherby Magnum 1947 This cartridge is the result of giving the “Weatherby treatment” to the legendary 375 H&H. Roy Weatherby’s 378 delivers 34 percent more energy at the muzzle than the powerful 375 H&H Magnum. 40^o--141 " 378 WBY-----175 grains As you can see the capacity of the improved and the 375 WBY are very close. The .458's, Winchester and Lott, tend to be very gentle in comparison. The 375 Weatherby was a stepping stone for them eventually leading to the 378 that with modern bullets is an absolute hammer and while not as popular as the H&H of which I own two, ammo is readily available worldwide. The parent case is based on the .300 H&H Magnum blown … 375 Impr. "Bob" Thomson. Joined Aug 10, 2018 Messages 2,331 Reaction score 3,001. Shootist: You're correct.In looking at your trajectory table I see the same things I have been seeing for 20-30 years with a wide variety of 7mm and 300 magnums with a variety of bullets. Dies and head stamped brass is available for the WBY at affordable prices. The .375 Weatherby Magnum (9.5×73mmB) is a medium-bore rifle cartridge. Ballistics Velocity. What's great about this chambering is that it will still digest factory .375 H&H as well as .375 Weatherby ammo. The order of case capacity is: H&H, Ruger, 375 Weatherby, RUM, 378 Weatherby. I have two 375 H&H rifles on ZKK 602 actions. After many years out of production, the 375 was reintroduced in 2001. Mag. Performance. The .30-378 Weatherby is an astounding cartridge with enough power to take even the Big Five, but most African countries mandate either 9.3mm or .375 caliber as the minimum for dangerous game hunting. The .378 Weatherby cannot be fireformed from existing case designs (apart from the .460 Weatherby). ANd factory ammo is available, not for the improved versions. This cartridge is the result of giving the “Weatherby treatment” to the legendary 375 H&H. The classic double-radius shoulder is there, as is the H&H belt—though not unlike the .338 Winchester, the belt is only there for show as the .340 headspaces off the shoulder—and though the .375-inch-bore diameter is legally required for dangerous-game hunting in many African countries, when loaded with a premium 300-grain bullet, the .340 Weatherby Magnum is a serious cartridge. With his improved case shape, Weatherby made the original .375 H&H the .375 Wby in 1945. 375 H&H instead of 375 or 378 Weatherby, 416 Rigby instead of 416 Weatherby, any 458 Lott instead of 460 Weatherby! Left to right: .376 Steyr, .375 Flanged Magnum, .375 H&H Magnum, .375 Ruger, .375 Weatherby Magnum, .375 Remington Ultra Magnum and .378 Weatherby Magnum. I have used 350 grain and 380 grain bullets with great success but I prefer 2300 to 2400 fps for DG hunting. The 375 H&H can be rechambered to 375 Weatherby inexpensively allowing the use of both rounds. Reactions: spike.t and Velo Dog. The cartridge is blown out, ... choice for those who want a step up in performance over the .375 H&H Magnum without the recoil or cost of the .378 Weatherby Magnum. The same can be said about any standard cartridges when compared to its Weatherby counterpart. JM . By enlarging the case to hold more powder, Roy Weatherby was able to achieve 200 more fps than the respected Holland & Holland version. In addition to the .375 Weatherby, relative newcomers include the .378 Weatherby, .375 Dakota, .375 Rem. The .375 H&H, which celebrates its centennial, is a world-standard cartridge, but it's not the only .375. One has a thicker barrel. If you still need more the 500 Jeff or 505 Gibbs or any of the NE cartridges should satisfy those needs rather than the Weatherby route. While the .375 H&H wears the crown for the bore diameter, there have been challengers. Although the .340 and .378 are versatility … Reactions: HARPERC and 375 JDJ. Try finding ammo for your "AI" in Africa or for that matter ANYWHERE in the US if the airlines gooned up your luggage. Thanks for the help.. Marc. This was introduced as a Weatherby proprietary cartridge in 1953. If you are rechambering an H&H rifle either will work. Well, I am glad that what I did fear was some the reasons for these has to to with the user, not the gun and also to that Weatherby did use poor bullets, a good bullet in 375 H&H may not be a good bullet in a 378 WM, same to be with a 450 NE vs a 460 WB. Dec 31, 2013 #10 L. longestrange … as does the .375 Remington Ultra Magnum, but the greatest threat came along in 2007, with Hornady’s development of the .375 Ruger. 30-06 works on 600 pound elk,even Jack's 270 is enough with a good shooter as you mention-so it makes sense that great shot placement with even a 6.5 x 55 Swede on moose can trump a poor shot placement from a 375 H&H, I suggest something more user friendly,and it certainly would be easier to shoot in awkward or tight places than the Weatherby. Nevertheless, cases were easy enough to form for those already in ownership of .375 Weatherby rifles. As one can argue that the .338 and .375 are extremely versatile cartridges for anything worldwide, the Weatherby variations make it even more so. The .378, .416, and .460 Weatherby are all based upon a .416 Rigby case with a belt added to it, and the .375 H&H case will not work for them. Performance. What one is the better, I also want to be able to shoot standard 375 H&H ammo if necessary? I have a Weatherby Vanguard the series 2 375 H&H. The 378 Weatherby is B!#$%!! Yes to both and certainly stock has something to do with it synthetic on the .378 Wby as opposed to wood on the .460 however I find that the bigger high velocity calibers (.338-.378, .378 Wby) have a much sharper and violent recoil than the heavier slower calibers (.375, .416, .458). The stock is solid. Some of these are more powerful than the .375 H&H and some about the same or somewhat less powerful. Many wildcats and the .375 Weatherby Magnum have the body taper removed and have a sharpened shoulder angle, increasing case capacity and velocity. The result is flatter trajectory and greater energy yield. I have two Winchester M70 both with control feed. Aug 29, 2020 #6 A. asd9055 Well-Known Member. McCray. The .375 Weatherby is indeed a blown out .375 H&H case and can easily be fireformed from .375 H&H brass. One is the … Only recently was the .300 Wby outclassed by the .300 Dakota, .300 Remington Ultra Mag and .30-378 Wby, all based on fatter cases. 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. AH legend. With the right bullet, the .30-378 approaches the .338 Lapua, and bullet choice is critical. It was superseded in 1953 by his .378 Wby based on a larger case. on steroids, the .378 is the .375 H&H on steroids. 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