Not going into the "shanks vs mihawk" debate, because I'm just chilling watching y'all go at each other, but Yasopp's marksmanship is often stated as worldly renowned in vivre cards, etc.
Meanwhile we just learned that Beckmann uses some rifle to fight, despite the fact that we only saw using his gun as a baseball bat, except for the RED movie.
He pointed the gun at Kizaru, but Roux shot the thug in the flashback, etc.
Trying to say that Yasopp is not a better shooter than Beckmann, just to preserve the argument for the Shanks vs Mihawk debate, is kinda wack, IMO.
Anyway, gonna let you all go back to the fandom war.