338 win mag
 

Does anyone know if a 338 Win Mag Ruger Mark II can be reamed to chamber the 338 Ultra mag or the 340 WBY mag? If so, is there that much difference in those cartridges to make the change worth it? Any knowledge share would be great......

latts

RE: 338 win mag
 

Hi latts,

If I'm not mistaken the .338 Winchester Magnum chambering in the Ruger is a "standard length" action. The .338 Winchester Magnum does not require a true magnum length action. The two other rounds you mentioned will NOT fit in a standard length action. The conversion is NOT possible!

You'd need to start with a "magnum length" action.

Good luck!

Dave

RE: 338 win mag
 

IMO if you can't do it with a .338 Win Mag, you can't do it with the Weatherby or RUM version as well.

If you truly want more power I'd suggest you look at the time honored .375 H&H magnum.

akbound is correct.....the Weatherby and RUM versions are not only longer, the RUM is a larger diameter as well.....and will require feed rail work and a smaller magazine capacity.......something few serious hunters are not keen about.

RE: 338 win mag
 

Yes it can be done the magazine box has to be changed out ...bolt stop modified.