250ms is way too much in virtually every case. I have set it to 50ms and would not take it above 100ms. The H3/H4 seems to have less slap than the H1/H2/H2F. Good triggers that do above 1/250th that I use are: Pocketwizard & Skyport. Not cheap but I prefer reliable above cheap, in the end reliable is always cheapest, IMO.