What ammo were you using? Commercial .30-06 is likely loaded with a powder unsuitable for the Garand. The Garand is intended to use ammo loaded with powder with a specific burn rate and corresponding pressure curve. Slow powders can and will bed the op rod.
You should shoot only M-2 ball ammo or handloads with 4895 powder (either IMR or Hodgdon).
Time for a new op rod. Live and learn.
You should shoot only M-2 ball ammo or handloads with 4895 powder (either IMR or Hodgdon).
Time for a new op rod. Live and learn.