I would think that anything that can handle the size and pressures from the 300 R.U.M. can handle the 338 Lapua (the RUM has higher case capacity then the 338 Lapua), but I'm not sure if there isa bolt face size issue. That having been said I would expect that any Long Action capable of handling the 300 RUM should be able to accomodate the 338 Lapua, like Weatherby, Winchester, Remington, Sako, Neseka.
JeffVN