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Hunting
The Basics, Starting Out
Trying to make decisions Building a 338-378 Weatherby
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<blockquote data-quote="Long Time Long Ranger" data-source="post: 286309" data-attributes="member: 505"><p>I still hunt with my original 338-378 that I built on a mk 5 action in 1979. 28" hart barrel that still shoots like a dream making half mile shots on big game fairly trivial. This particular rifle was built for the 250 gameking which had just came out with the highest BC of any hunting bullet ever produced up until that time. It was for sure a new innovation in hunting for that time pushing the 250 nearly 3400 fps. Now I am pushing the 225 AB at over 3500 fps with a .550 BC. The big 6 point bull elk I shot last year with it just dropped in his tracks at 814 yards.</p><p></p><p>You will need a muzzle brake on the rifle to shoot it accurately. 28" barrel is long enough since you gain very little velocity with barrel length in the big 338's. I currently own seven 338-378's along with numerous other big 338's. If most of your hunting doesn't exceed a half mile the 225 AB will have a much flatter trajectory and kill anything you encounter inside that range unless T-Rex is reincarnated. If your hunting goes out to a 1000 yards and beyond shoot the 300 matchking with Retumbo or H-870 and you can get it over 3000 fps in the 28" barrel. I have seen them shoot clear through an elk at over a thousand yards out of a 338-378. </p><p></p><p>I hunt with all the popular big 338's off the wby, lapua and ultramag cases. There is not a whole lot of difference in any of them but the big 378 case and the 416 improved case gets a little more velocity to take away a few clicks in elevation and wind since time of flight is a little quicker.</p></blockquote><p></p>
[QUOTE="Long Time Long Ranger, post: 286309, member: 505"] I still hunt with my original 338-378 that I built on a mk 5 action in 1979. 28" hart barrel that still shoots like a dream making half mile shots on big game fairly trivial. This particular rifle was built for the 250 gameking which had just came out with the highest BC of any hunting bullet ever produced up until that time. It was for sure a new innovation in hunting for that time pushing the 250 nearly 3400 fps. Now I am pushing the 225 AB at over 3500 fps with a .550 BC. The big 6 point bull elk I shot last year with it just dropped in his tracks at 814 yards. You will need a muzzle brake on the rifle to shoot it accurately. 28" barrel is long enough since you gain very little velocity with barrel length in the big 338's. I currently own seven 338-378's along with numerous other big 338's. If most of your hunting doesn't exceed a half mile the 225 AB will have a much flatter trajectory and kill anything you encounter inside that range unless T-Rex is reincarnated. If your hunting goes out to a 1000 yards and beyond shoot the 300 matchking with Retumbo or H-870 and you can get it over 3000 fps in the 28" barrel. I have seen them shoot clear through an elk at over a thousand yards out of a 338-378. I hunt with all the popular big 338's off the wby, lapua and ultramag cases. There is not a whole lot of difference in any of them but the big 378 case and the 416 improved case gets a little more velocity to take away a few clicks in elevation and wind since time of flight is a little quicker. [/QUOTE]
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The Basics, Starting Out
Trying to make decisions Building a 338-378 Weatherby
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