I can see no reason why the operating system of the Garand would need any modifications to function with the 366 Wagner. The pressure curves for the two cartridges in question are very similar and one could load the 9.3 to make it work correctly. Factory ammo may be a small problem (but I doubt it) and most 9.3 shooters handload anyway. The function of the gas system on the Garand is not the least picky and the two I had would work with 150, 180 and 200 gn bullets all using different powders and pressure curves. I don't recall them ever failing to feed or function. I did not do a lot of work with them but I remember that I was impressed with their lack of being fussy (for want of a better phrase).
This could probably morph into a bear defence thread if we aren't careful here...........really what could be better than 8 X 270-320 grn 9.3mm bullets for self preservation............but let's not go down that road...........
