After looking over presssure and loading data in Hodgdon's information, I'm sure it will work just fine.

Winchester Western .348 brass is immensly strong brass that will give long life - if - care is taken to make it fit before it's first firing.

One incredible trait of the Lee Enfield rifles, is the extractor works without modification with ctgs. from the .222 (even the .340" diameter Hornet rim will extract) line all the way to the .45/70 rim size (includes .348Win.)