Forums
New posts
Search forums
What's new
Articles
Latest reviews
Author list
Classifieds
Log in
Register
What's new
Search
Search
Search titles and first posts only
Search titles only
By:
New posts
Search forums
Menu
Log in
Register
Install the app
Install
Forums
Hunting
Long Range Hunting & Shooting
338 Cal, What Chamber to use?
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Reply to thread
Message
<blockquote data-quote="Old Timer" data-source="post: 8091" data-attributes="member: 1474"><p>I have built many of the big 338's. Yes you can easily open the 300 wby bolt face in a mk v. You also must get the 378 magazine box, etc. I have built several 338-378's and various improved Lapua's off the action. Like someone else said, the best without modifying the action would be using the ultramag case which has no belt. If you opened the bolt face then one of the Rigby or Lapua improved versions would be the best choice if you don't want a belt. The 338-378 wby or the rigby would be the fastest with the 338-300 ultra and the lapua being a bit slower with virtually identical velocities. </p><p></p><p>I disagree with an earlier post. I have never seen a lapua that could shoot faster than one based off either the 378 or rigby case. Those two are the supreme velocity rounds. I own about four off the lapua case and like them very much. They have some great attributes but are not the fastest. I think I have six 338-378's, four lapuas and seven off the ultramag case all in 338 caliber. All of these are within a couple hundred fps of each other so no big difference either way. Then I have several of these same cases necked to 358. And then a few more still in 30, 8mm and 375. </p><p></p><p>I learned long ago in my hunting career that there is a reason they use big calibers in Africa. They work best on big game! That is why I have plenty of them.</p></blockquote><p></p>
[QUOTE="Old Timer, post: 8091, member: 1474"] I have built many of the big 338's. Yes you can easily open the 300 wby bolt face in a mk v. You also must get the 378 magazine box, etc. I have built several 338-378's and various improved Lapua's off the action. Like someone else said, the best without modifying the action would be using the ultramag case which has no belt. If you opened the bolt face then one of the Rigby or Lapua improved versions would be the best choice if you don't want a belt. The 338-378 wby or the rigby would be the fastest with the 338-300 ultra and the lapua being a bit slower with virtually identical velocities. I disagree with an earlier post. I have never seen a lapua that could shoot faster than one based off either the 378 or rigby case. Those two are the supreme velocity rounds. I own about four off the lapua case and like them very much. They have some great attributes but are not the fastest. I think I have six 338-378's, four lapuas and seven off the ultramag case all in 338 caliber. All of these are within a couple hundred fps of each other so no big difference either way. Then I have several of these same cases necked to 358. And then a few more still in 30, 8mm and 375. I learned long ago in my hunting career that there is a reason they use big calibers in Africa. They work best on big game! That is why I have plenty of them. [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Hunting
Long Range Hunting & Shooting
338 Cal, What Chamber to use?
Top