Ironically, the .338 Lapua cartridge introduced much later became immensely popular and generated further interest in hot .338 magnums including the giant .338-378 Weatherby while the original .340 Weatherby continued to maintain a more modest following. The … The modern day .338 lapua magnum is a rimless bottle-neck shaped cartridge. 338-378 Weatherby Magnum Powder Minimum Maximum Charge (grains) Velocity (fps) Charge (grains) Velocity (fps) RL 25 105.0 3172 113.0 3373 *RL 22 98.5 3147 106.5 … Downrange performance can be summarized with two statistics: maximum point blank range (MPBR) and retained energy at that range. A Cheat-Sheet to Die for. "Weatherby 338" For Sale. .338 Lapua Mag vs .338-378 Weatherby Discussion in 'General Rifle Discussion' started by J33Nelson, Mar 7, 2009. That’s about a 20 percent increase in case capacity. Need Help Filtering . Don't forget the .340 Weatherby, .338-.378 Weatherby, 8.59 Galaxy, 330 Dakota, .338 Canadian Magnum, .338 A-Square, .338 Excaliber and finally the 8.59 Titan. 338 Rum is where the .338 gets interesting..as far as ballistics go and its the cheapest 338 hot rod to shoot.. 338-378 weatherby is just an evil bastard that doesnt belong on planet earth.. theres actually some loadings with H1000 or RL25 that put the 300gr smk at 2950 . LOW PRICES 338 Lapua Savage Pre Fit Barrel And 338 378 Weatherby Mag Vs 338 Lapua. I know I will. When we look at the cartridge specs for the .300 Win Mag vs .338 Lapua Magnum we see some immediate differences that will likely lead to differences in how these two cartridges perform. Upon making further improvements, the finish manufacturers made the .338 Magnum rounds compatible with semi-automatic weapons. 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. More capacity means more propellant and more propellant means higher … The 338 Lapua wins due to ease of acquiring brass. 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. The new shape of the … The .378 Weatherby Magnum was designed by Roy Weatherby in 1953. Campfire Ranger. The .30-378 Weatherby Magnum Mark V with Synthetic Stock & Bipod. .338-378 Weatherby Weatherby’s .338-378 is pure power personified. 300 PRC and .300 Win Mag factory loads generally have similar muzzle velocities, but the 300 PRC shoots a heavier bullet with a higher BC. 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. salmonhead . Its enormous case capacity helps explain why. Staying with 300 WM vs 300 WBY mag means the long action rifles in inventory can be converted much easier than the Weatherby version. salmonhead OP. GUARANTEED SUB-MOA ACCURACY. Just four years after the release of the .338 Winchester, Roy Weatherby countered with his own take on the .338-inch-bore diameter: the .340 Weatherby Magnum. Further development continued with a case based on the .416 Rigby, an English big-game cartridge, with the case necked down to 0.338-inch. Photo by Michael Patrick McCarty . 338 Lapua Magnum Load Data; 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… J33Nelson New Member. The .338 with a 250gr bullet is capable of taking down an Elk, Deer, Moose, or Bear out to 1000 to 1200 yards with good results. The 215 magnum rifle primer was developed by Federal specifically for this round. Grand Rapids, Mi. I have heard the brass is better, but is the shape of the cartrige better … Grand Rapids, Mi. From a 250yd zero:.338 Lapua is 3.4" high at 150yds and drops 39" by 500yds..338-.378 Weatherby is 2.8" high at 150yds and drops 33.5" by 500yds..340 Weatherby is 3.7" high at 150yds and drops 42" by 500yds. The ballistics on the .338-378 Weatherby are better than the Lapua Mag but it is not nearly as popular. At 2750fps the .340 Weatherby drops about 40yds off the Lapua's ranges. .338 Lapua, 7.4%.338-378 Weatherby, 10.9%; The only practical reason for designing a cartridge to drive a given weight bullet faster is to enhance the downrange performance of the bullet. What are the advantages, if there are any, of the Lapua round over the others? … Mar 7, 2009 #1 . On sale 338 Lapua Sniper Rifle Cost And 338 378 Weatherby Mag Vs 338 Lapua You can order 338 Lapua Sniper Rifle Cost And 338 378 Weatherby Mag Vs 338 Lapua afte Brass. Not a factor for what the military wanted. *Most Accurate Load C Compressed Load 1. The.338-378 Weatherby Magnum started out as the wildcat cartridge.338-378 Keith-Thomson Magnum during the early 1960s. The .338-378 Weatherby is currently the most powerful .338” factory cartridge. 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. Even the lowly .338 Winchester Magnum … The .338-378 Weatherby case holds 137 grains of water compared to the .338 Lapua, which holds 114 grains of water. 1; 2; 3 > » (0) Weatherby MARS65CMR4O Mark V Accumark RC Bolt 6.5 CRD 24 4+1 St $ 1,635.00 (0) WBY VANGUARD DLX 300WBY 26 AA WALNUT GLOSS BLUE $ 941.00 (1) WBY VANGUARD 257WBY 26 WILDERNESS Black Gray WEB $ 750.00 (0) Weatherby VDT300WR6O Vanguard Sporter Bolt 300 Weatherby Magnum $ 703.00 (5) Weatherby … THAT is it. Joined: Dec 2007. In 1998 Weatherby standardized the full length .378 Weatherby case (2.908”/73.86mm) necked down to .338”, naming it the .338-378 Weatherby. .338 edge is a formed 338 RUM or from the .300 RUM brass, formed from fire forming. OP. 770 Yards? Lapua VS RUM, 338-378, 340 Wby etc #5038927 03/13/11: Joined: Dec 2007. Why is the .338 Lapua Mag more popular than the .338-378 Weatherby Mag? For what 338 lapua ammo and components cost you could shoot a 50 bmg. Posts: 1,727. Campfire Ranger. Am I missing something?? I’ve sent hundreds of rounds of 340 Weatherby down range and was enamored with the cartridge in the late 90s. 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 available at that time. Yes indeed it's better than a .338 Lapua. 338 Edge. 43 0 0. Both Elmer Keith and Roy Weatherby experimented with necking-down the big .378 case to accept .338" bullets, but these experiments remained wildcats for almost 30 years. … Unless you are among the fortunate few that got a hold of the great Federal brass, you are stuck with Remington crud brass. If one is after long shots, then the RUM, Lapua and the king of them all, the 338-378 Weatherby. The .30-378 Weatherby Magnum is truly a high performance hunting caliber. Weatherby and lapua brass is very expensive, 338 RUM or edge would be much less expensive brass. FEATURES INCLUDE: SUB-MOA accuracy guarantee (.99” or less 3-shot group at 100 yards when used with Weatherby® factory or premium ammunition) Accubrake Included … That means it is a whopping big cartridge case. Posts: 1,727. The .338 Lapua shoots a smaller bullet, but rules in the long range field. 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. Photo By … the brass does not cost a buck and a half per. 2,088 Posts #3 • Feb 2, 2009. The .338 LM rounds are a larger caliber than the .300 Win Mag and have a slightly longer case and overall length. All the others are in the same ballpark. 300 Win Mag vs 338 Lapua vs 338 Win Mag: Cartridge Sizes The shared heritage of the .300 Win Mag and .338 Win Mag, as well as the unique roots of the .338 Lapua, is obvious in the photo below. The .338 is also able to be fitted with much heavier bullets than the .300 Win Mag rounds. (Photo courtesy of Weatherby) This monster was officially introduced in 1998, but Elmer Keith and others had been fooling around with a .338-378 wildcat decades prior. 375 H&H or 338 Lapua wich is better for You're almost to the point of talking apples and oranges here. Now let’s go. At 3050fps the .338-.378 WB adds about 90yds to those ranges. In the early days, the .338 lapua sniper cartridge was made to ground itself on a .378 Weatherby case, but was soon altered for more precision and penetration power. The .375 hits with tremendous authority, but has a rainbow trejectory. Keith and Thomson are Elmer Keith and R. W. "Bob" Thomson. These are all powerful .338s and they ALL suffer the same thing, brass availabilty. Twist Rate: 1:10” Barrel: Wiseman 338-378 Weatherby Magnum 338-378 Weatherby Magnum Maximum Loads Should Be Used With Caution - Always Start With Minimum Loads. The 338 edge would be easiest because there is no shortage of 300 RUM brass out there and it is very easy to neck up. Better shoulder. sam. As the name implies, Weatherby's ultimate .338 is based on a necked-down .378 Weatherby Magnum case. The 338's advantage is heavier bullets at similar trajectory. ----- Weatherby ammo is similarly expensive and only a few places load for it. You may wish to take one along on your next mountain hunting adventure. JimmAr, Feb 23, 2009 … Hodgdon,s has some pretty hot loads if you go to their site.I doubt that you will outlast the barrel.In working with both at max loads we found little difference.There is considerable difference when you go to the .338-378 Weatherby. 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. 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 … These Yardages Correspond With Hashmarks and Post In The Rifle Scope. COMPARE RESET. 338 lapua = mimics a max pressure/hot 338 winchester, a very over hyped waste of money. 338 vs 300 weatherby I would say the 338 winchester is a bit or much better for the tough brownies.. Fisher Space Pen Bullet 09FS338 Der etwas andere Tactical Pen und ein Muss für jeden Schreibtischtäter. I am not sure that I would have any weatherby and especially the 300 it is no better than the 300 win. Instead of using a 2.50-inch case to take advantage of the .30-06-length receiver, Roy decided a magnum-length case and receiver was warranted. 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