Are the 22 rifle bullet and an m16 rifle bullet?

No. They're not even remotely close to being the same.

The two bullets are the same caliber but that is where the similarity ends. The M-16 bullet is about 3 times the length of a 22LR, completely different in shape, about 4 times the weight, etc. Also the cartridge used in the M-16 has more than 10 times the powder than a 22LR, giving much higher muzzle velocity.