See how that 1917 handles 200gr NPT's or 220 gr RN's from Sierra, Hornady or Rem if available. It will give you the experimenting and bench time before you may screw up a good thing as is. I have a 35 Whelen, 338-06, 338 Win Mag and a 375 H& H so I base this from some actual shooting time with all. MB
I will probably do this before totally committing to the redo project.