My AR15 is all over the paper . Shooting my reloads 55 grain FMJBT. Took it out to 100 yrds and could not get on paper .

It was dead on till then . Took it 50 yrds . and at times would not get on paper .



I shoot a3x9x50 scope with about 500 rounds with it on the rifle .
I don't get it ?? Scope broken ? It was a cheap Tasco but still .
Any insight welcome . I am currently tearing it down and going to free float it. I did not have any iron sights on it to check if something else was wrong ( other than the scope )
Please help .
Arley