350L is all the rage for us now and shoots well. I want the 400L, it is superior to the 350 in every way but there is little support compared to the 350(guns-there are many makes and models for the 350, 400 there are only a couple and i think we are 3 years out since the cartridge came out) and factory ammo-currently and for the last year winchester makes 2 loads for the 400...thats it, not to mention reloading supplies non existent for the 400). But my dad just bought a 400 in a savage and there is a ruger im eyeing.
so getting that off my chest, to your question. i assume theres a 350 barrel out there but prolly not a 400. the 350 has a big following so far for us straight wall folks and you will have no issue getting supplies.
