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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
338 lapua v. 338-378 weatherby
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<blockquote data-quote="Fiftydriver" data-source="post: 56768" data-attributes="member: 10"><p>Christopher,</p><p></p><p>Being a accuracy minded rifle builder, it is of my opinion that if two rifles are built to the smae match grade quality in two different chamberings such as the two you list, there will be no difference in accuracy potential.</p><p></p><p>I believe it is teh rifle that makes the accuracy not the round.</p><p></p><p>The 338 Lapua was designed for long range shooting in mind for military purposes. The 338-378 was designed simply to provide teh biggest baddest factory 338 available, basically Wby's reason for all of their rounds.</p><p></p><p>That said, the 338-378 is a great round if you can handle the recoil and with a quality brake they are easy to control.</p><p></p><p>While the 338 Lapua is certainly a large magnum round, it is not even in the same class as the 338-378 Wby. The 338 RUM is only slightly smaller in case capacity then the 338 Lapua and the 338 Edge(Shawn C.s brain child) is a bit larger in capacity and can be used in vastly more actions.</p><p></p><p>Trueth is, the 338 Lapua was at one time the end all of long range factory rounds. Now it is near the top but there are cheaper and higher performance wounds out there.</p><p></p><p>The 338-378 will do with 250 gr bullets what the 338 Lapua will do with 225 gr pills. Or it will give you around 150 to 200 fps more velocity with the same bullet weights.</p><p></p><p>As far as accuracy, I built myself a 338 Kahn which is basically an improved 338-378 Wby with conventional 35 degree shoulder. This round is roughly 10 gr larger incapacity then the 338-378 parent case. Yesterday, I landed two 300 gr Wildcat ULDs within 3" at 1300 yards just to see how they would group at that range. </p><p></p><p>In a quality built rifle, either round will flat smoke in performance and accuracy potential.</p><p></p><p>At extreme range the velocity advantage of the 338-378 is not a huge deal to worry about. Just a little more of the same good old thing.</p><p></p><p>Good Shooting!!</p><p></p><p>Kirby Allen(50)</p></blockquote><p></p>
[QUOTE="Fiftydriver, post: 56768, member: 10"] Christopher, Being a accuracy minded rifle builder, it is of my opinion that if two rifles are built to the smae match grade quality in two different chamberings such as the two you list, there will be no difference in accuracy potential. I believe it is teh rifle that makes the accuracy not the round. The 338 Lapua was designed for long range shooting in mind for military purposes. The 338-378 was designed simply to provide teh biggest baddest factory 338 available, basically Wby's reason for all of their rounds. That said, the 338-378 is a great round if you can handle the recoil and with a quality brake they are easy to control. While the 338 Lapua is certainly a large magnum round, it is not even in the same class as the 338-378 Wby. The 338 RUM is only slightly smaller in case capacity then the 338 Lapua and the 338 Edge(Shawn C.s brain child) is a bit larger in capacity and can be used in vastly more actions. Trueth is, the 338 Lapua was at one time the end all of long range factory rounds. Now it is near the top but there are cheaper and higher performance wounds out there. The 338-378 will do with 250 gr bullets what the 338 Lapua will do with 225 gr pills. Or it will give you around 150 to 200 fps more velocity with the same bullet weights. As far as accuracy, I built myself a 338 Kahn which is basically an improved 338-378 Wby with conventional 35 degree shoulder. This round is roughly 10 gr larger incapacity then the 338-378 parent case. Yesterday, I landed two 300 gr Wildcat ULDs within 3" at 1300 yards just to see how they would group at that range. In a quality built rifle, either round will flat smoke in performance and accuracy potential. At extreme range the velocity advantage of the 338-378 is not a huge deal to worry about. Just a little more of the same good old thing. Good Shooting!! Kirby Allen(50) [/QUOTE]
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338 lapua v. 338-378 weatherby
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