One parameter that is not measurable for most shooters is pressure. Lastly, I must admit I was never impressed with Ackley. One is the … 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.. 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. 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. 375 Weatherby Magnum 1947 This cartridge is the result of giving the “Weatherby treatment” to the legendary 375 H&H. McCray. colorado. 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. Ballistics Velocity. The .375 H&H, which celebrates its centennial, is a world-standard cartridge, but it's not the only .375. AH legend. It was superseded in 1953 by his .378 Wby based on a larger case. 375 H&H instead of 375 or 378 Weatherby, 416 Rigby instead of 416 Weatherby, any 458 Lott instead of 460 Weatherby! Thanks for the help.. Marc. Try finding ammo for your "AI" in Africa or for that matter ANYWHERE in the US if the airlines gooned up your luggage. Joined Aug 10, 2018 Messages 2,331 Reaction score 3,001. I have two Winchester M70 both with control feed. Although the .340 and .378 are versatility … The stock is solid. on steroids, the .378 is the .375 H&H on steroids. ANd factory ammo is available, not for the improved versions. 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. Founded by legendary hunter Roy Weatherby, Weatherby Firearms produces some particularly high-quality rifles like the Mark V and the Vanguard models. The .378 Weatherby is a larger case, being the .460 Weatherby or .416 Weatherby case necked down to .375. The .458's, Winchester and Lott, tend to be very gentle in comparison. of energy. Performance. For the money I don’t think you can go wrong with it. Joined Nov 15, 2013 Messages 371 Location Texas. To be quite honest the 375 Weatherby is one of the milder ones and matches 375 H&H AI Ballistics. 30-378 Weatherby Magnum Produced 1996 The 30-378 was designed & tested in … Hornady Superformance 162 gr SST was closest to … With his improved case shape, Weatherby made the original .375 H&H the .375 Wby in 1945. 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 375 H&H can be rechambered to 375 Weatherby inexpensively allowing the use of both rounds. The .378 achieves Roy Weatherby’s goals in every way. If you are rechambering an H&H rifle either will work. Dec 31, 2013 #10 L. longestrange … Mag. Since 1955, the 378 has become one of the world’s most popular cartridges for the largest of big game animals. 20 November 2010, 07:18. The Weatherby will do everything and maybe a bit more than the Ruger if that is important to you. Most recent experience with factory loads (most of my guns never see factory ammo) is with a friend's 7mm RemMag. I have a Weatherby Vanguard the series 2 375 H&H. 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. 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”. 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. The … Aug 29, 2020 #6 A. asd9055 Well-Known Member. The .375 Weatherby Magnum (9.5×73mmB) is a medium-bore rifle cartridge. The .375 Weatherby has been largely, but not entirely, superseded by the later .378 Weatherby. 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. This cartridge is the result of giving the “Weatherby treatment” to the legendary 375 H&H. 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". Dies and head stamped brass is available for the WBY at affordable prices. 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. Design and Specifications The .375 Weatherby Magnum is an improved version of the .375 H&H Magnum. 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. It pushes a 300-grain Nosler Partition between 2,650 and 2,750 fps and delivers 5,000 ft.-lbs. 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. One has a thicker barrel. 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. The 378 Weatherby is B!#$%!! 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. 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. 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. The .375 Weatherby Magnum and its big brother, the .378 Weatherby, offer an increase in velocity (500 fps for the big .378!) 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). By enlarging the case to hold more powder, Roy Weatherby was able to achieve 200 more fps than the respected Holland & Holland version. I’ve seen spare .375 H&H ammo in almost every African camp I've been in, and it was very popular among the Australian buffalo guides. AH elite. The .378 Weatherby cannot be fireformed from existing case designs (apart from the .460 Weatherby). The .378 Weatherby outshone the former cartridge and by 1960 the .375, though very useful in its own right, was made obsolete. 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. 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. Performance. BUY NOW. The .375 Weatherby is indeed a blown out .375 H&H case and can easily be fireformed from .375 H&H brass. Technically you can fire form standard ammo in either chamber. 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". Only recently was the .300 Wby outclassed by the .300 Dakota, .300 Remington Ultra Mag and .30-378 Wby, all based on fatter cases. Some of these are more powerful than the .375 H&H and some about the same or somewhat less powerful. I foubd a 375 Weatherby that I sorta liked and would like to hear a little more about them. The same can be said about any standard cartridges when compared to its Weatherby counterpart. While the .375 H&H wears the crown for the bore diameter, there have been challengers. Roy Weatherby’s 378 delivers 34 percent more energy at the muzzle than the powerful 375 H&H Magnum. Also it’s a good shooting rifle, mine will shoot three well under an inch. Whats better and even whats the difference, 375 Weatherby vs the AI???? Several noted gun writers have said this is the harshest recoiling cartridge they’ve ever fired. 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. Reactions: HARPERC and 375 JDJ. BUY NOW . The parent case is based on the .300 H&H Magnum blown … In 2001 the Weatherby arms company made the decision to revive their classic cartridge by once again producing factory ammunition. as does the .375 Remington Ultra Magnum, but the greatest threat came along in 2007, with Hornady’s development of the .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. After many years out of production, the 375 was reintroduced in 2001. I have two 375 H&H rifles on ZKK 602 actions. I think it’s a really nice rifle, it doesn’t have the cheap stock like the cheaper vanguards. This was introduced as a Weatherby proprietary cartridge in 1953. The recently introduced .370 Sako Magnum, actually a 9.3mm (.366"), was intentionally misnamed to appeal to the American market. Recoil Comparison of 450-400 Nitro Ruger No1 vs 375 H&H Sako Brown Bear. Ultra Mag, .376 Steyr and .375 Ruger. The .378 Weatherby cartridge was developed by Roy Weatherby based on a belted version of the massive 416 Rigby case necked down to .375”. The result is flatter trajectory and greater energy yield. "Bob" Thomson. I'm not really asking which one is better. Most hand loads are high pressure and most factory loads are far from it. I have used 350 grain and 380 grain bullets with great success but I prefer 2300 to 2400 fps for DG hunting. Reactions: spike.t and Velo Dog. In addition to the .375 Weatherby, relative newcomers include the .378 Weatherby, .375 Dakota, .375 Rem. JM . B. bruce moulds. What one is the better, I also want to be able to shoot standard 375 H&H ammo if necessary? Nevertheless, cases were easy enough to form for those already in ownership of .375 Weatherby rifles. With the right bullet, the .30-378 approaches the .338 Lapua, and bullet choice is critical. 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