...Your OP [strike]made it sound like[/strike] tried to TRICK ME INTO BELIEVING that 500 rounds would let you shoot 33 times...
Type what you really mean.
I will re-size his original fonts so others aren't confused by the maths.
I would think 500 rounds of each caliber would be plenty. If you shot 30 round magazines, that would allow you to shoot 33 times...