My typical setting is right about that range, 1/500 F2.8 ISO6400. Probably 90% of my indoor sport photos are with those settings. I know that's slow for many sports, but it works for mine as it gives little bit motion on the swords, instead of static. Makes them look more alive. Similar idea as many motor sports look better with slower ss and panning the subject. Here's example of my shots:
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