RE: 338 Federal
I'd say you are confussed... The 338 fed is simply a 308 case that has been necked up to 338 cal.. NOW the 338 LAPUA is all together a different story. It is based on a necked down 416 Rigby cartridge which can produce recoil levels that most shooter would find very uncomfortable.. But man do the LAPUA'S everSHOOT FLATandHIT HARD!!!
The LAPUA is a mag shell it just isn't belted.