I just picked up a custom Remington 1917 I bought on Gbroker, listed as a .416 Rem Mag. I had my doubts, as it was marked strangely for a .416 RM. Turns out I was right, it is not a 416 Rem Mag. It is stamped "416 MRE." Anybody ever hear of such a wildcat ? It is chambered for a belted case, and is indeed a .416 bore, but neither 416 RM or 416 Taylor will chamber. The Taylor nearly chambers, but bolt is still maybe .05 to .1" from closing. It is also marked on the barrel HW Creighton, which I believe is well known gunsmith Harry Creighton who passed away in 1985, before the 416 Remington was introduced. The magazine is also too short for the 416 Rem, the 416 Taylor does fit magazine and feed fine. I intend to chamber cast it just to verify that a 416 Remington reamer will clean up the chamber and then re-chamber it to the Remington (first choice) or Rigby.