Any SAMMI spec 148~165 grain .30-06 ammunition will function and fire just fine in a Garand. The bullet shape, (flat vs. BT), will have no effect on function.
And for those who say the Garand was not designed to shoot anything over 150 grain, you need to check your history.
Many thousands of competition shooters have used the 168 gr Match bullets for years, (myself counted among them, having fired many hundreds of 168 gr HPBT in my Garand), and I knew a few who were shooting heavier [173~175] grain bullets in unaltered Garands for years, with no problems or damage to the firearm.
Mind you that we/they knew what we/they were doing when we/they loaded those heavier bullets and did not exceed safety margins.