Originally Posted by chuxta
Hello! I am a new member! I've been looking though the forums and I have learned so much already. I have been shooting forever and have been fixing and improving my guns for several years, now its time to build! I have been researching ballistics and learning about long range shooting and hunting. I have decided to build a .338 Lapua with a Weatherby Mark V action. I am currently hunting for a donor rifle, and I was wondering which rifles actions will work with such a large cartridge?
Any of the 9 lug Mark V s will work.
You will have to open the bolt face to.590 on all of them (The 378 based cases are .579).
The bolt stop groove will have to be extended a little to get maximum travel from the bolt.
The 378 to 460 extractors work perfectly with little or no work on them.
Also the 378 based mag box and bullet follower work perfectly because it is a flat top follower
and the magazine can be tuned to fit the Lapua case.
The mark Vs are the way to go in my opinion for the Lapua cases.
J E CUSTOM