View Single Post
Old August 12, 2011, 08:03 PM   #14
SHR970
Senior Member
 
Join Date: January 24, 2011
Posts: 1,427
338 Lapua is based off of a 416 Rigby case with the rim diameter of the case at .587". This requires a non-standard bolt face / Weatherby bolt face size.

The RUM family of cartridges are based off of the 404 Jeffrey case with the rim diameter cut down to .534. They fit a standard Magnum cartridge bolt face.

The Lapua needs a Magnum length (Weatherby) or over length action.
The RUM line uses a Remington 700 Long Action.

The 338 RUM uses a slightly shorter brass length that the rest of the family so they can load and use 300 grain bullets in the 700 long action.

Factory RUM ammo is NOT all it can be velocity wise; the Lapua is.
Power / velocity wise, the Lapua and RUM are both pretty close*.

The Lapua was made from the get go on a "tactical" platform; the RUM was made on a hunting platform.

* I routinely get 100-150 fps. over factory velocity with my 375 RUM using published loads on 300 gr. bullets and I am not loading to max.
SHR970 is offline  
 
Page generated in 0.03655 seconds with 8 queries