Developed as an upgrade to the 375 Weatherby, the 378 Weatherby Magnum is an original design with no parent case. Compare prices from more than 30+ gun stores. 30-40 krag improved. I'm calling it the 375 Zayne. .378 Weatherby Magnum Ackley Improved (40° Shoulder) Chamber Reamer at Pacific Tool and Gauge Buy Now. Another Weatherby wildcat, first introduced in the 1960s. Find 338-378 Weatherby Mag Ammo for sale, in-stock and ready to ship at Ammo Freedom. The 300 Weatherby improved is the 308 BAER,, 30RDP, 30 Goodling and a few others. Weatherby Mark V Accumark Bolt Action Rifle … Video! Bob is right, I think Kirby has the 338 lapua improved, I am building a 7mm 416 rigby. Right now I'm having my 30-378 rebarreled with a longer 30" barrel and gonna shoot some 240 gr bergers vld's. Brownells is your source for 378 Weatherby Magnum 30-06 Improved 40 at Brownells parts and accessories. Weatherby Choke Tube Flush, 0703, 12 Ga, Weatherby ... Weatherby Unprimed Brass Cases For 378 Weatherby 20/Box (BRASS378), Not Loaded $ 87.70 MPN: BRASS378 UPC: 747115070558. Norma makes Weatherby's brass. While the statistics of the .378 are heroic, Glenn reminds us, “As we’ve read, there are many stories floating around the big game hunting circles of the 378’s bullet failures on heavy game. jsthntn247. 30-80 winchester experimental. I'm secretly building a rifle to give my son Zayne for his 15th birthday in August. I'm about to step up to a big bore that will be used mainly for brown bear and eventually in Africa. I'm looking at either a 375 H&H Mag or the 378 Weatherby. Twenty four inch fluted barrel and stainless steel fluted bolt. Joined: Fri Jun 12, 2009 5:30 pm Posts: 474 Location: Colorado Don, yes the factory 30-378Wby has a 28" long barrel and the Wby freebore. 30-40 wesson. Located minutes from public hunting access in the Bighorn Mountains, and endless grassland prairies. Prior to Keith and Thompson’s development of the .338-378 wildcat, Keith was promoting the virtues of high velocity medium bores firing heavy, long for caliber bullets for use on large bodied (Elk upwards) North American game. Weatherby’s rich heritage began in 1945 located in Southern California. I would pick another case like the Lapua or WSM. The ubiquitous 215 magnum rifle primer was actually developed by Federal Cartridge Company for the 378 Weatherby Magnum cartridge. by Weatherby. Overview. Extremely powerful and flat shooting. As far as I'm concerned, it's not far off at all in quality of anything Lapua makes. Free shipping over $20, new in box. Save big on a new 30 378 weatherby. The .338-378 Weatherby case holds 137 grains of water compared to the .338 Lapua, which holds 114 grains of water. “Bob” Thomson (aka Thompson) developed a similar wildcat on the .378 case. Bulk Ammunition on sale, including 338-378 Weatherby Mag Rifle Rounds. 30-378 Weatherby Magnum: $1,899.99. I,am fairly shure the Lapua used 416 cases in the begaining ,before they made there own cases.I was considering the 7-378 because you can get 30 -378 cases and neck them down easily. A true family business operated by third-generation leader Adam Weatherby headquartered in Sheridan, Wyoming. Added to Your Cart. 30-378 weatherby magnum. 30-378 Weatherby Magnum Rifle Cartridge. [4] The 215 magnum rifle primer was developed by Federal specifically for this round. Based upon the 378 case, necked down to 338. Add To Wish List. $1,699.97 Delivery Method. Weatherby ~ Mark V ~ .338-378 Wby Mag Description: Weatherby Mark V in .338-378 Weatherby Magnum. It's a 375/378 Weatherby Improved. "Bob" Thomson. That’s about a … Technically you can fire form standard ammo in either chamber. Reintroduced as a Weatherby production cartridge in 1998. If you are rechambering an H&H rifle either will work. 378 WBY-----175 grains As you can see the capacity of the improved and the 375 WBY are very close. Posted: Sat Dec 18, 2010 1:38 pm . Abbreviated Name: 30-378 Wby Mag . The history of this cartridge dates back to 1966, when Elmer Keith and R.W. Always hit the mark with a MidwayUSA Gift Certificate. Cheaper too I might add. . Weatherby’s cases are also fairly readily available and are pretty close to the same price: $3.50/case for 338 Lapua vs $3.50/case for Weatherby 338-378 depending where you pick them up from. -- -- -175 grains as you can see the capacity of the improved and the 375 WBY very... New in box 375 WBY are very close.378 Weatherby case holds 137 of. Perfect Gift WBY at affordable prices i love the 30-378 though and look forward to some long. 375 Weatherby, the.375 Weatherby is an original design with no parent case 40 at parts! Up for Exciting Eblast™ Promotions Subscribe the Perfect Gift cartridge was inspired by the capacity of the Rigby... 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