So, flat trajectory, stationary target. probably inside of 100 yards, plenty of time to focus and carefully place shot.. misses
100yds+, downward angle, moving target, rushed.. hits. twice!
Documentary theorized Oswald’s bullet grazed the window frame just enough to deflect the shit.
And, according to the Warren Commission report, that rifle was brought into the Texas School Book Depositary disassembled, but then reassembled and fired accurately by Oswald fired without any sort of calibration or test shots.