This is a just a short summary of my ideas (I'll edit with more detail later) but it seems ever since he saved Robin from the tower of justice that Ussop hasnt given his sharp shooting skills a second thought.
All his battles since then are
Vs. Marine Captains
Vs. Suprise Zombies
Vs. General Zombies (I think)
Vs. Vs. Kizaru, Sentomaru, PX?, Kuma
Now out of these battles the one that made me bring this up was versus the flying fish riders. After watching episode 389 it occured to me that Ussop wasnt using his Kabuto at all really. Despite him holding it when Luffy shouts "To battle!". It seems that in a situation where there are many moving targets flying outside of the range of most of the crew a sharpshooters skills would be the most appreciated and it would be a good test of Ussop's skills, yet he doesnt shoot down ANY and doesnt get involved at all untill Franky reveals the Gaon cannon. Meanwhile Sanji is jumping in the air, robin is clutching, and luffy is punching. All tactis that while yes WERE, effective were not the BEST means to handle the situation. It makes me wonder if he's even attempting to become a better marksmen or he just gave up or perhaps never intended(?) to get any better.
Thoughts, opinions, facts, feelings are apprecaited.
Vs Marine Captains and Buster Call- Not sure what you're talking about here as he did use his sharpshooting skills here, he repeatedly shot marines down from the air and dealt with that guy Zoro was fighting from a distance. Not very impressive perhaps but the whole point of the buster call was that they were surrounded and that they had no where to run to, forcing Ussop to use his Kabuto at short range.
Vs surprise zombies and General Zombies- I can remember very little of this but wasn't the whole point of the surprise zombies to,you know, surprise them. I.E Ussop had no chance to set up a sniping position and was forced to use his Kabuto at close range. And I'm pretty sure he never fought General Zombies as he was in Perona's garden at the time.
Vs Perona- He did use his sniping skills here, to great effect.
Vs Oz- He also used them here, though to a lesser degree. He fired that slippery stuff exactly underneath where Oz's hand was when he was falling, he aimed Franky and Brook directly at Oz and he shot that bag of salt into Oz's mouth. He used his skills as much as the rest of the crew did.
Vs Kuma-Ussop kinda got blown up here.
Vs FFR- Wasn't he chosen to use the Gaon cannon because he was such a good shot that he could take out most of them in one blow. Also I vaguely recall him sniping some of them with a cannon in that fight, I'm probably wrong though.
Vs Marines- He was running for his life, he's hardly going to show off leet sniping skills
Vs PX1- He did use his talents here, he shot that missile directly into PX1's mouth which caused it to self-destruct.
Vs Kizaru, Sentomaru, PX?, Kuma- Oh I know, let's trying sniping a guy who's five feet away from me, can turn into light, blind me, move at the speed of light and has just destroyed my crew's second most powerful member in one hit.
So yeah Ussop's still Sogeking.