I just bought a Garand and I was wondering where I could find out the bullet trajectory is on it?
thanks

You need the field manual for it.  The "trajectory" is the elevation knob on which has the range stamped into it in microscopic numbers.

Bullet is a 150 grain FMJ-flat base going about 2750ish fps with a medium burning powder, like 4895.

Repeat after me, "I will not use slow-burning powder in my Garand.  I will not shoot Hornady Light Magnum in my Garand..."

Good buy.

The bullet trajectory is based on the type and muzzle velocity of the bullet.  There are a couple of cartridges that were produced for the Garand ranging from standard ball to armor piercing, tracer, etc.

The Seirre Bullets reloading guide has good ballistic and trajectory tables in the back.  These are for there bullets only though.