So i was playing a match and i hit the jett for 154. Isn't the max damage 150 ? Also sometimes it shows I gave 300 damage. So what does it mean?

​ https://preview.redd.it/296cpuq7ne0a1.png?width=1080&format=png&auto=webp&s=aeeeecbdb4709fb56c7e2a62afdfe6269862d670 So, one day, I saw a fishychair video saying why guardian only was the way to go, and needless to say, I gave it...